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gaussdb

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Reviewed-by: Wagner, Fabian <fabian.wagner@t-systems.com>
Co-authored-by: Wang , Deng Ke <wangdengke2@huawei.com>
Co-committed-by: Wang , Deng Ke <wangdengke2@huawei.com>
This commit is contained in:
Wang , Deng Ke 2023-11-27 14:17:27 +00:00 committed by zuul
parent 710480502f
commit 024ed39d62
40 changed files with 94 additions and 78 deletions
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7
docs/gaussdb_mysql/umn/ALL_META.TXT.json
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@ -1,4 +1,7 @@
[
{
"dockw":"User Guide"
},
{
"uri":"overview.html",
"node_id":"overview.xml",
@ -839,7 +842,7 @@
"node_id":"gaussdb_03_0047.xml",
"product_code":"gaussdb",
"code":"45",
"des":"You can manually delete a DB instance on the Instance Management page.If you delete a DB instance, the read replicas associated with it are also deleted.Deleted DB instan",
"des":"You can manually delete a DB instance on the Instances page.If you delete a DB instance, the read replicas associated with it are also deleted.Deleted DB instances cannot",
"doc_type":"usermanual",
"kw":"Procedure,Deleting a DB Instance,Instance Modifications,User Guide",
"search_title":"",
@ -972,7 +975,7 @@
"node_id":"gaussdb_03_0114.xml",
"product_code":"gaussdb",
"code":"52",
"des":"You can manually delete read replicas on the Instance Management page.Deleted read replicas cannot be restored. Exercise caution when performing this operation.You can de",
"des":"You can manually delete read replicas on the Instances page.Deleted read replicas cannot be restored. Exercise caution when performing this operation.You can delete read ",
"doc_type":"usermanual",
"kw":"Procedure,Deleting a Read Replica,Read Replicas,User Guide",
"search_title":"",

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docs/gaussdb_mysql/umn/CLASS.TXT.json
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@ -396,7 +396,7 @@
"code":"44"
},
{
"desc":"You can manually delete a DB instance on the Instance Management page.If you delete a DB instance, the read replicas associated with it are also deleted.Deleted DB instan",
"desc":"You can manually delete a DB instance on the Instances page.If you delete a DB instance, the read replicas associated with it are also deleted.Deleted DB instances cannot",
"product_code":"gaussdb",
"title":"Deleting a DB Instance",
"uri":"gaussdb_03_0047.html",
@ -459,7 +459,7 @@
"code":"51"
},
{
"desc":"You can manually delete read replicas on the Instance Management page.Deleted read replicas cannot be restored. Exercise caution when performing this operation.You can de",
"desc":"You can manually delete read replicas on the Instances page.Deleted read replicas cannot be restored. Exercise caution when performing this operation.You can delete read ",
"product_code":"gaussdb",
"title":"Deleting a Read Replica",
"uri":"gaussdb_03_0114.html",

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docs/gaussdb_mysql/umn/change_history.html
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</th>
</tr>
</thead>
<tbody><tr id="change_history__row153719118197"><td class="cellrowborder" valign="top" width="21.85%" headers="mcps1.3.1.1.3.1.1 "><p id="change_history__p553710151912">2023-10-25</p>
<tbody><tr id="change_history__row95151742133918"><td class="cellrowborder" valign="top" width="21.85%" headers="mcps1.3.1.1.3.1.1 "><p id="change_history__p851615429394">2023-11-13</p>
</td>
<td class="cellrowborder" valign="top" width="78.14999999999999%" headers="mcps1.3.1.1.3.1.2 "><p id="change_history__p125161642133911">Modified the following content:</p>
<p id="change_history__p57065816392">Allowed you to change the node names synchronously during DB instance name change in <a href="gaussdb_03_0032.html">Changing a DB Instance Name</a>.</p>
<p id="change_history__p1348216321408">Added the event of deleting a task from the task center in <a href="gaussdb_03_0014.html">Key Operations Supported by CTS</a>.</p>
</td>
</tr>
<tr id="change_history__row153719118197"><td class="cellrowborder" valign="top" width="21.85%" headers="mcps1.3.1.1.3.1.1 "><p id="change_history__p553710151912">2023-10-25</p>
</td>
<td class="cellrowborder" valign="top" width="78.14999999999999%" headers="mcps1.3.1.1.3.1.2 "><p id="change_history__p1853714181910">Modified the following content:</p>
<p id="change_history__p673142761912">Added specifications (2 vCPUs | 8 GB) in <a href="gaussdb_01_0004.html">DB Instance Specifications</a>.</p>

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docs/gaussdb_mysql/umn/gaussdb_02_0004.html
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<h1 class="topictitle1">Step 1: Create a DB Instance</h1>
<div id="body8662426"><div class="section" id="gaussdb_02_0004__en-us_topic_0171122419_section3881006517148"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_02_0004__en-us_topic_0171122419_p168872184212">This section describes how to create a DB instance on the management console.</p>
</div>
<div class="section" id="gaussdb_02_0004__en-us_topic_0171122419_sa49e76d034cc442ab719cd1f42a02558"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_02_0004__en-us_topic_0171122419_oc0a2b98371dd48ae94959405dfc6e5d3"><li id="gaussdb_02_0004__li5319223817319"><span>Log in to the management console.</span></li><li id="gaussdb_02_0004__li2024912215295"><span>Click <span><img id="gaussdb_02_0004__image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_02_0004__li181542917431"><span>Click <strong id="gaussdb_02_0004__b4353193615913">Service List</strong>. Under <strong id="gaussdb_02_0004__b163533362595">Database</strong>, click <strong id="gaussdb_02_0004__b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_02_0004__en-us_topic_0171122419_l3af6a9cc8c404c93b5c915fc46a3aaac"><span>On the <span class="uicontrol" id="gaussdb_02_0004__uicontrol17919155415256"><b>Instance Management</b></span> page, click <span class="uicontrol" id="gaussdb_02_0004__uicontrol6921195452520"><b>Create DB Instance</b></span>.</span></li><li id="gaussdb_02_0004__en-us_topic_0171122419_l9e0f6a131be340e1b0b53a950bf5fef6"><span>On the displayed page, configure parameters about the DB instance specifications. Then, click <span class="uicontrol" id="gaussdb_02_0004__uicontrol184361659879"><b>Create Now</b></span>.</span><p>
<div class="section" id="gaussdb_02_0004__en-us_topic_0171122419_sa49e76d034cc442ab719cd1f42a02558"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_02_0004__en-us_topic_0171122419_oc0a2b98371dd48ae94959405dfc6e5d3"><li id="gaussdb_02_0004__li5319223817319"><span>Log in to the management console.</span></li><li id="gaussdb_02_0004__li2024912215295"><span>Click <span><img id="gaussdb_02_0004__image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_02_0004__li181542917431"><span>Click <strong id="gaussdb_02_0004__b4353193615913">Service List</strong>. Under <strong id="gaussdb_02_0004__b163533362595">Database</strong>, click <strong id="gaussdb_02_0004__b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_02_0004__en-us_topic_0171122419_l3af6a9cc8c404c93b5c915fc46a3aaac"><span>On the <span class="uicontrol" id="gaussdb_02_0004__uicontrol17919155415256"><b>Instances</b></span> page, click <span class="uicontrol" id="gaussdb_02_0004__uicontrol6921195452520"><b>Create DB Instance</b></span>.</span></li><li id="gaussdb_02_0004__en-us_topic_0171122419_l9e0f6a131be340e1b0b53a950bf5fef6"><span>On the displayed page, configure parameters about the DB instance specifications. Then, click <span class="uicontrol" id="gaussdb_02_0004__uicontrol184361659879"><b>Create Now</b></span>.</span><p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0004__en-us_topic_0171122419_table2225129135419" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Basic information</caption><thead align="left"><tr id="gaussdb_02_0004__en-us_topic_0171122419_row82251935412"><th align="left" class="cellrowborder" valign="top" width="17.669999999999998%" id="mcps1.3.2.2.5.2.1.2.3.1.1"><p id="gaussdb_02_0004__en-us_topic_0171122419_p142251694540"><strong id="gaussdb_02_0004__en-us_topic_0171122419_b84235270618284">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="82.33%" id="mcps1.3.2.2.5.2.1.2.3.1.2"><p id="gaussdb_02_0004__en-us_topic_0171122419_p1322516915549"><strong id="gaussdb_02_0004__en-us_topic_0171122419_b842352706212013">Description</strong></p>
@ -12,7 +12,7 @@
</thead>
<tbody><tr id="gaussdb_02_0004__en-us_topic_0171122419_row622516920543"><td class="cellrowborder" valign="top" width="17.669999999999998%" headers="mcps1.3.2.2.5.2.1.2.3.1.1 "><p id="gaussdb_02_0004__en-us_topic_0171122419_p82251193549">Region</p>
</td>
<td class="cellrowborder" valign="top" width="82.33%" headers="mcps1.3.2.2.5.2.1.2.3.1.2 "><p id="gaussdb_02_0004__en-us_topic_0171122419_p134556434485">A region where the tenant is located. You can change it on the creation page, or go back to the <strong id="gaussdb_02_0004__b14680134165910">Instance Management</strong> page and change it in the upper left corner.</p>
<td class="cellrowborder" valign="top" width="82.33%" headers="mcps1.3.2.2.5.2.1.2.3.1.2 "><p id="gaussdb_02_0004__en-us_topic_0171122419_p134556434485">A region where the tenant is located. You can change it on the creation page, or go back to the <strong id="gaussdb_02_0004__b14680134165910">Instances</strong> page and change it in the upper left corner.</p>
<div class="notice" id="gaussdb_02_0004__en-us_topic_0171122419_note32252965412"><span class="noticetitle"> NOTICE: </span><div class="noticebody"><p id="gaussdb_02_0004__en-us_topic_0171122419_p172250910546">Products in different regions cannot communicate with each other over a private network and you cannot change the region of a DB instance after creating the instance.</p>
</div></div>
</td>
@ -47,9 +47,9 @@
</table>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0004__en-us_topic_0171122419_table13240997543" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Specifications and storage</caption><thead align="left"><tr id="gaussdb_02_0004__en-us_topic_0171122419_row2225890545"><th align="left" class="cellrowborder" valign="top" width="20.07%" id="mcps1.3.2.2.5.2.2.2.3.1.1"><p id="gaussdb_02_0004__en-us_topic_0171122419_p132257916546"><strong id="gaussdb_02_0004__b1449621734">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0004__en-us_topic_0171122419_table13240997543" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Specifications and storage</caption><thead align="left"><tr id="gaussdb_02_0004__en-us_topic_0171122419_row2225890545"><th align="left" class="cellrowborder" valign="top" width="20.07%" id="mcps1.3.2.2.5.2.2.2.3.1.1"><p id="gaussdb_02_0004__en-us_topic_0171122419_p132257916546"><strong id="gaussdb_02_0004__b1857504646">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="79.93%" id="mcps1.3.2.2.5.2.2.2.3.1.2"><p id="gaussdb_02_0004__en-us_topic_0171122419_p112251899547"><strong id="gaussdb_02_0004__b1190353029">Description</strong></p>
<th align="left" class="cellrowborder" valign="top" width="79.93%" id="mcps1.3.2.2.5.2.2.2.3.1.2"><p id="gaussdb_02_0004__en-us_topic_0171122419_p112251899547"><strong id="gaussdb_02_0004__b286297464">Description</strong></p>
</th>
</tr>
</thead>
@ -74,9 +74,9 @@
</table>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0004__en-us_topic_0171122419_table42406975413" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Network</caption><thead align="left"><tr id="gaussdb_02_0004__en-us_topic_0171122419_row42407919548"><th align="left" class="cellrowborder" valign="top" width="21.19%" id="mcps1.3.2.2.5.2.3.2.3.1.1"><p id="gaussdb_02_0004__en-us_topic_0171122419_p11240189205418"><strong id="gaussdb_02_0004__b691310903">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0004__en-us_topic_0171122419_table42406975413" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Network</caption><thead align="left"><tr id="gaussdb_02_0004__en-us_topic_0171122419_row42407919548"><th align="left" class="cellrowborder" valign="top" width="21.19%" id="mcps1.3.2.2.5.2.3.2.3.1.1"><p id="gaussdb_02_0004__en-us_topic_0171122419_p11240189205418"><strong id="gaussdb_02_0004__b1013323653">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="78.81%" id="mcps1.3.2.2.5.2.3.2.3.1.2"><p id="gaussdb_02_0004__en-us_topic_0171122419_p324014918549"><strong id="gaussdb_02_0004__b1355014615">Description</strong></p>
<th align="left" class="cellrowborder" valign="top" width="78.81%" id="mcps1.3.2.2.5.2.3.2.3.1.2"><p id="gaussdb_02_0004__en-us_topic_0171122419_p324014918549"><strong id="gaussdb_02_0004__b1027282407">Description</strong></p>
</th>
</tr>
</thead>
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</table>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0004__en-us_topic_0171122419_table13240209195412" frame="border" border="1" rules="all"><caption><b>Table 4 </b>Database configuration</caption><thead align="left"><tr id="gaussdb_02_0004__en-us_topic_0171122419_row1424011975415"><th align="left" class="cellrowborder" valign="top" width="21.18%" id="mcps1.3.2.2.5.2.4.2.3.1.1"><p id="gaussdb_02_0004__en-us_topic_0171122419_p1524016975416"><strong id="gaussdb_02_0004__b1287167855">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0004__en-us_topic_0171122419_table13240209195412" frame="border" border="1" rules="all"><caption><b>Table 4 </b>Database configuration</caption><thead align="left"><tr id="gaussdb_02_0004__en-us_topic_0171122419_row1424011975415"><th align="left" class="cellrowborder" valign="top" width="21.18%" id="mcps1.3.2.2.5.2.4.2.3.1.1"><p id="gaussdb_02_0004__en-us_topic_0171122419_p1524016975416"><strong id="gaussdb_02_0004__b598157855">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="78.82000000000001%" id="mcps1.3.2.2.5.2.4.2.3.1.2"><p id="gaussdb_02_0004__en-us_topic_0171122419_p72404919543"><strong id="gaussdb_02_0004__en-us_topic_0171122419_b84235270618288">Description</strong></p>
</th>
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</table>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0004__table16717956123819" frame="border" border="1" rules="all"><caption><b>Table 5 </b>Parameter template</caption><thead align="left"><tr id="gaussdb_02_0004__row271817565382"><th align="left" class="cellrowborder" valign="top" width="18.38%" id="mcps1.3.2.2.5.2.5.2.3.1.1"><p id="gaussdb_02_0004__p9230191703918"><strong id="gaussdb_02_0004__b725558704">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0004__table16717956123819" frame="border" border="1" rules="all"><caption><b>Table 5 </b>Parameter template</caption><thead align="left"><tr id="gaussdb_02_0004__row271817565382"><th align="left" class="cellrowborder" valign="top" width="18.38%" id="mcps1.3.2.2.5.2.5.2.3.1.1"><p id="gaussdb_02_0004__p9230191703918"><strong id="gaussdb_02_0004__b1575809994">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="81.62%" id="mcps1.3.2.2.5.2.5.2.3.1.2"><p id="gaussdb_02_0004__p18230817113920"><strong id="gaussdb_02_0004__b1916711850">Description</strong></p>
<th align="left" class="cellrowborder" valign="top" width="81.62%" id="mcps1.3.2.2.5.2.5.2.3.1.2"><p id="gaussdb_02_0004__p18230817113920"><strong id="gaussdb_02_0004__b481704261">Description</strong></p>
</th>
</tr>
</thead>
@ -160,7 +160,7 @@
</table>
</div>
</p></li><li id="gaussdb_02_0004__li6351398154947"><span>Confirm your specifications.</span><p><ul id="gaussdb_02_0004__ul39403645154947"><li id="gaussdb_02_0004__li19088491154947">If you need to modify your settings, click <strong id="gaussdb_02_0004__en-us_topic_0171122419_b842352706185329">Previous</strong>.</li><li id="gaussdb_02_0004__li6426625316046">If you do not need to modify your settings, click <span class="uicontrol" id="gaussdb_02_0004__uicontrol1473113409613"><b>Submit</b></span>.</li></ul>
</p></li><li id="gaussdb_02_0004__en-us_topic_0171122419_l6f2649c440bc4d59b0ca6d9640c496d8"><span>To view and manage DB instances, go to the <span class="uicontrol" id="gaussdb_02_0004__en-us_topic_0171122419_uicontrol41940418112351"><b>Instance Management</b></span> page.</span><p><ul id="gaussdb_02_0004__en-us_topic_0171122419_ul1174910499416"><li id="gaussdb_02_0004__en-us_topic_0171122419_li147497499413">During the creation process, the DB instance status is <strong id="gaussdb_02_0004__b10946115621620">Creating</strong>. When the status of the created instance is <strong id="gaussdb_02_0004__b12351173915012">Available</strong>, the DB instance can be used.</li><li id="gaussdb_02_0004__en-us_topic_0171122419_li07491949124117">An automated backup policy is enabled by default. After the DB instance is created, you can modify this policy as required. An automated full backup is immediately triggered after a DB instance is created.</li><li id="gaussdb_02_0004__en-us_topic_0171122419_li20202241135617">The default database port is <strong id="gaussdb_02_0004__en-us_topic_0171122419_b9989388511">3306</strong>. After a DB instance is created, you can change its port.<p id="gaussdb_02_0004__p20488123515417">For details, see <a href="gaussdb_03_0012.html">Changing a Database Port</a>.</p>
</p></li><li id="gaussdb_02_0004__en-us_topic_0171122419_l6f2649c440bc4d59b0ca6d9640c496d8"><span>To view and manage DB instances, go to the <span class="uicontrol" id="gaussdb_02_0004__en-us_topic_0171122419_uicontrol41940418112351"><b>Instances</b></span> page.</span><p><ul id="gaussdb_02_0004__en-us_topic_0171122419_ul1174910499416"><li id="gaussdb_02_0004__en-us_topic_0171122419_li147497499413">During the creation process, the DB instance status is <strong id="gaussdb_02_0004__b10946115621620">Creating</strong>. When the status of the created instance is <strong id="gaussdb_02_0004__b12351173915012">Available</strong>, the DB instance can be used.</li><li id="gaussdb_02_0004__en-us_topic_0171122419_li07491949124117">An automated backup policy is enabled by default. After the DB instance is created, you can modify this policy as required. An automated full backup is immediately triggered after a DB instance is created.</li><li id="gaussdb_02_0004__en-us_topic_0171122419_li20202241135617">The default database port is <strong id="gaussdb_02_0004__en-us_topic_0171122419_b9989388511">3306</strong>. After a DB instance is created, you can change its port.<p id="gaussdb_02_0004__p20488123515417">For details, see <a href="gaussdb_03_0012.html">Changing a Database Port</a>.</p>
</li></ul>
</p></li></ol>
</div>

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<p id="gaussdb_02_0008__en-us_topic_0171122646_en-us_topic_0134327719_p147943013223">If you use <strong id="gaussdb_02_0008__en-us_topic_0171122646_b4779330614023">0.0.0.0/0</strong>, all IP addresses are enabled to access DB instances in the security group.</p>
</div></div>
</div>
<div class="section" id="gaussdb_02_0008__en-us_topic_0171122646_sd7df6780947f4922b3c5cb114ae3d12e"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_02_0008__en-us_topic_0171122646_o13a2543136f045df92268b6f8b5f248c"><li id="gaussdb_02_0008__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_02_0008__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_02_0008__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_02_0008__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_02_0008__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_02_0008__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_02_0008__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_02_0008__en-us_topic_0171122646_lcd296510316241ec96805ea09290dde0"><span>On the <strong id="gaussdb_02_0008__en-us_topic_0171122646_b15787103615547">Instance Management</strong> page, click the target DB instance.</span></li><li id="gaussdb_02_0008__en-us_topic_0171122646_l1ac30215d6984fc686c27070a9875aab"><span>Configure security group rules.</span><p><p id="gaussdb_02_0008__en-us_topic_0171122646_p1428132133210">In the <strong id="gaussdb_02_0008__en-us_topic_0171122646_b189409398124">Network Information</strong> area on the <strong id="gaussdb_02_0008__b4769164313302">Basic Information</strong> page, click the security group.</p>
<div class="section" id="gaussdb_02_0008__en-us_topic_0171122646_sd7df6780947f4922b3c5cb114ae3d12e"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_02_0008__en-us_topic_0171122646_o13a2543136f045df92268b6f8b5f248c"><li id="gaussdb_02_0008__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_02_0008__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_02_0008__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_02_0008__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_02_0008__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_02_0008__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_02_0008__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_02_0008__en-us_topic_0171122646_lcd296510316241ec96805ea09290dde0"><span>On the <strong id="gaussdb_02_0008__en-us_topic_0171122646_b15787103615547">Instances</strong> page, click the target DB instance.</span></li><li id="gaussdb_02_0008__en-us_topic_0171122646_l1ac30215d6984fc686c27070a9875aab"><span>Configure security group rules.</span><p><p id="gaussdb_02_0008__en-us_topic_0171122646_p1428132133210">In the <strong id="gaussdb_02_0008__en-us_topic_0171122646_b189409398124">Network Information</strong> area on the <strong id="gaussdb_02_0008__b4769164313302">Basic Information</strong> page, click the security group.</p>
</p></li><li id="gaussdb_02_0008__en-us_topic_0171122646_lb0e8440adcea471c8992839ce9093a65"><span>On the <strong id="gaussdb_02_0008__en-us_topic_0171122646_b1514219161512">Inbound Rules</strong> tab, click <strong id="gaussdb_02_0008__en-us_topic_0171122646_b313832731519">Add Rule</strong>. In the displayed dialog box, set required parameters and click <strong id="gaussdb_02_0008__en-us_topic_0171122646_b14827125984310">OK</strong>.</span><p><div class="p" id="gaussdb_02_0008__en-us_topic_0171122646_en-us_topic_0134327719_p179625268405">You can click <strong id="gaussdb_02_0008__en-us_topic_0171122646_b728513118449">+</strong> to add more inbound rules.
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0008__table48641848194714" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Inbound rule parameter description</caption><thead align="left"><tr id="gaussdb_02_0008__row1686410482475"><th align="left" class="cellrowborder" valign="top" width="17.611761176117614%" id="mcps1.3.3.2.6.2.1.2.2.4.1.1"><p id="gaussdb_02_0008__p6864114818478"><strong id="gaussdb_02_0008__en-us_topic_0171122646_b178657444443">Parameter</strong></p>
</th>

20
docs/gaussdb_mysql/umn/gaussdb_02_0012.html
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@ -3,7 +3,7 @@
<h1 class="topictitle1">Step 1: Create a DB Instance</h1>
<div id="body8662426"><div class="section" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_section3881006517148"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p168872184212">This section describes how to create a DB instance on the management console.</p>
</div>
<div class="section" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_sa49e76d034cc442ab719cd1f42a02558"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_oc0a2b98371dd48ae94959405dfc6e5d3"><li id="gaussdb_02_0012__gaussdb_02_0004_li5319223817319"><span>Log in to the management console.</span></li><li id="gaussdb_02_0012__gaussdb_02_0004_li2024912215295"><span>Click <span><img id="gaussdb_02_0012__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_02_0012__gaussdb_02_0004_li181542917431"><span>Click <strong id="gaussdb_02_0012__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_02_0012__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_02_0012__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_l3af6a9cc8c404c93b5c915fc46a3aaac"><span>On the <span class="uicontrol" id="gaussdb_02_0012__gaussdb_02_0004_uicontrol17919155415256"><b>Instance Management</b></span> page, click <span class="uicontrol" id="gaussdb_02_0012__gaussdb_02_0004_uicontrol6921195452520"><b>Create DB Instance</b></span>.</span></li><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_l9e0f6a131be340e1b0b53a950bf5fef6"><span>On the displayed page, configure parameters about the DB instance specifications. Then, click <span class="uicontrol" id="gaussdb_02_0012__gaussdb_02_0004_uicontrol184361659879"><b>Create Now</b></span>.</span><p>
<div class="section" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_sa49e76d034cc442ab719cd1f42a02558"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_oc0a2b98371dd48ae94959405dfc6e5d3"><li id="gaussdb_02_0012__gaussdb_02_0004_li5319223817319"><span>Log in to the management console.</span></li><li id="gaussdb_02_0012__gaussdb_02_0004_li2024912215295"><span>Click <span><img id="gaussdb_02_0012__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_02_0012__gaussdb_02_0004_li181542917431"><span>Click <strong id="gaussdb_02_0012__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_02_0012__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_02_0012__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_l3af6a9cc8c404c93b5c915fc46a3aaac"><span>On the <span class="uicontrol" id="gaussdb_02_0012__gaussdb_02_0004_uicontrol17919155415256"><b>Instances</b></span> page, click <span class="uicontrol" id="gaussdb_02_0012__gaussdb_02_0004_uicontrol6921195452520"><b>Create DB Instance</b></span>.</span></li><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_l9e0f6a131be340e1b0b53a950bf5fef6"><span>On the displayed page, configure parameters about the DB instance specifications. Then, click <span class="uicontrol" id="gaussdb_02_0012__gaussdb_02_0004_uicontrol184361659879"><b>Create Now</b></span>.</span><p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_table2225129135419" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Basic information</caption><thead align="left"><tr id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_row82251935412"><th align="left" class="cellrowborder" valign="top" width="17.669999999999998%" id="mcps1.3.2.2.5.2.1.2.3.1.1"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p142251694540"><strong id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_b84235270618284">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="82.33%" id="mcps1.3.2.2.5.2.1.2.3.1.2"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p1322516915549"><strong id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_b842352706212013">Description</strong></p>
@ -12,7 +12,7 @@
</thead>
<tbody><tr id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_row622516920543"><td class="cellrowborder" valign="top" width="17.669999999999998%" headers="mcps1.3.2.2.5.2.1.2.3.1.1 "><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p82251193549">Region</p>
</td>
<td class="cellrowborder" valign="top" width="82.33%" headers="mcps1.3.2.2.5.2.1.2.3.1.2 "><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p134556434485">A region where the tenant is located. You can change it on the creation page, or go back to the <strong id="gaussdb_02_0012__gaussdb_02_0004_b14680134165910">Instance Management</strong> page and change it in the upper left corner.</p>
<td class="cellrowborder" valign="top" width="82.33%" headers="mcps1.3.2.2.5.2.1.2.3.1.2 "><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p134556434485">A region where the tenant is located. You can change it on the creation page, or go back to the <strong id="gaussdb_02_0012__gaussdb_02_0004_b14680134165910">Instances</strong> page and change it in the upper left corner.</p>
<div class="notice" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_note32252965412"><span class="noticetitle"> NOTICE: </span><div class="noticebody"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p172250910546">Products in different regions cannot communicate with each other over a private network and you cannot change the region of a DB instance after creating the instance.</p>
</div></div>
</td>
@ -47,9 +47,9 @@
</table>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_table13240997543" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Specifications and storage</caption><thead align="left"><tr id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_row2225890545"><th align="left" class="cellrowborder" valign="top" width="20.07%" id="mcps1.3.2.2.5.2.2.2.3.1.1"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p132257916546"><strong id="gaussdb_02_0012__gaussdb_02_0004_b1449621734">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_table13240997543" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Specifications and storage</caption><thead align="left"><tr id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_row2225890545"><th align="left" class="cellrowborder" valign="top" width="20.07%" id="mcps1.3.2.2.5.2.2.2.3.1.1"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p132257916546"><strong id="gaussdb_02_0012__gaussdb_02_0004_b1857504646">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="79.93%" id="mcps1.3.2.2.5.2.2.2.3.1.2"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p112251899547"><strong id="gaussdb_02_0012__gaussdb_02_0004_b1190353029">Description</strong></p>
<th align="left" class="cellrowborder" valign="top" width="79.93%" id="mcps1.3.2.2.5.2.2.2.3.1.2"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p112251899547"><strong id="gaussdb_02_0012__gaussdb_02_0004_b286297464">Description</strong></p>
</th>
</tr>
</thead>
@ -74,9 +74,9 @@
</table>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_table42406975413" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Network</caption><thead align="left"><tr id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_row42407919548"><th align="left" class="cellrowborder" valign="top" width="21.19%" id="mcps1.3.2.2.5.2.3.2.3.1.1"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p11240189205418"><strong id="gaussdb_02_0012__gaussdb_02_0004_b691310903">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_table42406975413" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Network</caption><thead align="left"><tr id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_row42407919548"><th align="left" class="cellrowborder" valign="top" width="21.19%" id="mcps1.3.2.2.5.2.3.2.3.1.1"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p11240189205418"><strong id="gaussdb_02_0012__gaussdb_02_0004_b1013323653">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="78.81%" id="mcps1.3.2.2.5.2.3.2.3.1.2"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p324014918549"><strong id="gaussdb_02_0012__gaussdb_02_0004_b1355014615">Description</strong></p>
<th align="left" class="cellrowborder" valign="top" width="78.81%" id="mcps1.3.2.2.5.2.3.2.3.1.2"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p324014918549"><strong id="gaussdb_02_0012__gaussdb_02_0004_b1027282407">Description</strong></p>
</th>
</tr>
</thead>
@ -102,7 +102,7 @@
</table>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_table13240209195412" frame="border" border="1" rules="all"><caption><b>Table 4 </b>Database configuration</caption><thead align="left"><tr id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_row1424011975415"><th align="left" class="cellrowborder" valign="top" width="21.18%" id="mcps1.3.2.2.5.2.4.2.3.1.1"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p1524016975416"><strong id="gaussdb_02_0012__gaussdb_02_0004_b1287167855">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_table13240209195412" frame="border" border="1" rules="all"><caption><b>Table 4 </b>Database configuration</caption><thead align="left"><tr id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_row1424011975415"><th align="left" class="cellrowborder" valign="top" width="21.18%" id="mcps1.3.2.2.5.2.4.2.3.1.1"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p1524016975416"><strong id="gaussdb_02_0012__gaussdb_02_0004_b598157855">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="78.82000000000001%" id="mcps1.3.2.2.5.2.4.2.3.1.2"><p id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_p72404919543"><strong id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_b84235270618288">Description</strong></p>
</th>
@ -129,9 +129,9 @@
</table>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0012__gaussdb_02_0004_table16717956123819" frame="border" border="1" rules="all"><caption><b>Table 5 </b>Parameter template</caption><thead align="left"><tr id="gaussdb_02_0012__gaussdb_02_0004_row271817565382"><th align="left" class="cellrowborder" valign="top" width="18.38%" id="mcps1.3.2.2.5.2.5.2.3.1.1"><p id="gaussdb_02_0012__gaussdb_02_0004_p9230191703918"><strong id="gaussdb_02_0012__gaussdb_02_0004_b725558704">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="gaussdb_02_0012__gaussdb_02_0004_table16717956123819" frame="border" border="1" rules="all"><caption><b>Table 5 </b>Parameter template</caption><thead align="left"><tr id="gaussdb_02_0012__gaussdb_02_0004_row271817565382"><th align="left" class="cellrowborder" valign="top" width="18.38%" id="mcps1.3.2.2.5.2.5.2.3.1.1"><p id="gaussdb_02_0012__gaussdb_02_0004_p9230191703918"><strong id="gaussdb_02_0012__gaussdb_02_0004_b1575809994">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="81.62%" id="mcps1.3.2.2.5.2.5.2.3.1.2"><p id="gaussdb_02_0012__gaussdb_02_0004_p18230817113920"><strong id="gaussdb_02_0012__gaussdb_02_0004_b1916711850">Description</strong></p>
<th align="left" class="cellrowborder" valign="top" width="81.62%" id="mcps1.3.2.2.5.2.5.2.3.1.2"><p id="gaussdb_02_0012__gaussdb_02_0004_p18230817113920"><strong id="gaussdb_02_0012__gaussdb_02_0004_b481704261">Description</strong></p>
</th>
</tr>
</thead>
@ -160,7 +160,7 @@
</table>
</div>
</p></li><li id="gaussdb_02_0012__gaussdb_02_0004_li6351398154947"><span>Confirm your specifications.</span><p><ul id="gaussdb_02_0012__gaussdb_02_0004_ul39403645154947"><li id="gaussdb_02_0012__gaussdb_02_0004_li19088491154947">If you need to modify your settings, click <strong id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_b842352706185329">Previous</strong>.</li><li id="gaussdb_02_0012__gaussdb_02_0004_li6426625316046">If you do not need to modify your settings, click <span class="uicontrol" id="gaussdb_02_0012__gaussdb_02_0004_uicontrol1473113409613"><b>Submit</b></span>.</li></ul>
</p></li><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_l6f2649c440bc4d59b0ca6d9640c496d8"><span>To view and manage DB instances, go to the <span class="uicontrol" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_uicontrol41940418112351"><b>Instance Management</b></span> page.</span><p><ul id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_ul1174910499416"><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_li147497499413">During the creation process, the DB instance status is <strong id="gaussdb_02_0012__gaussdb_02_0004_b10946115621620">Creating</strong>. When the status of the created instance is <strong id="gaussdb_02_0012__gaussdb_02_0004_b12351173915012">Available</strong>, the DB instance can be used.</li><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_li07491949124117">An automated backup policy is enabled by default. After the DB instance is created, you can modify this policy as required. An automated full backup is immediately triggered after a DB instance is created.</li><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_li20202241135617">The default database port is <strong id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_b9989388511">3306</strong>. After a DB instance is created, you can change its port.<p id="gaussdb_02_0012__gaussdb_02_0004_p20488123515417">For details, see <a href="gaussdb_03_0012.html">Changing a Database Port</a>.</p>
</p></li><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_l6f2649c440bc4d59b0ca6d9640c496d8"><span>To view and manage DB instances, go to the <span class="uicontrol" id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_uicontrol41940418112351"><b>Instances</b></span> page.</span><p><ul id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_ul1174910499416"><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_li147497499413">During the creation process, the DB instance status is <strong id="gaussdb_02_0012__gaussdb_02_0004_b10946115621620">Creating</strong>. When the status of the created instance is <strong id="gaussdb_02_0012__gaussdb_02_0004_b12351173915012">Available</strong>, the DB instance can be used.</li><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_li07491949124117">An automated backup policy is enabled by default. After the DB instance is created, you can modify this policy as required. An automated full backup is immediately triggered after a DB instance is created.</li><li id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_li20202241135617">The default database port is <strong id="gaussdb_02_0012__gaussdb_02_0004_en-us_topic_0171122419_b9989388511">3306</strong>. After a DB instance is created, you can change its port.<p id="gaussdb_02_0012__gaussdb_02_0004_p20488123515417">For details, see <a href="gaussdb_03_0012.html">Changing a Database Port</a>.</p>
</li></ul>
</p></li></ol>
</div>

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<div class="section" id="gaussdb_02_0015__en-us_topic_0171122739_section380043142120"><h4 class="sectiontitle">Precautions</h4><ul id="gaussdb_02_0015__en-us_topic_0171122739_ul383512621211"><li id="gaussdb_02_0015__en-us_topic_0171122739_li519405721219">Public accessibility reduces the security of DB instances. Therefore, exercise caution when enabling this function. To achieve a higher transmission rate and security level, you are advised to migrate your applications to the ECS that is in the same region as the <span id="gaussdb_02_0015__text3601019152016">GaussDB(for MySQL)</span> DB instance.</li></ul>
</div>
<div class="section" id="gaussdb_02_0015__en-us_topic_0171122739_section163851913174310"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_02_0015__en-us_topic_0171122739_ol12603704105129"><li id="gaussdb_02_0015__li114342521119"><span>Log in to the management console.</span></li><li id="gaussdb_02_0015__li243425261113"><span>Click <span><img id="gaussdb_02_0015__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_02_0015__li0435652111111"><span>Click <strong id="gaussdb_02_0015__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_02_0015__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_02_0015__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_02_0015__en-us_topic_0171122739_li193335257385"><span>On the <strong id="gaussdb_02_0015__en-us_topic_0171122739_b84235270615843">Instance Management</strong> page, click the target DB instance.</span></li><li id="gaussdb_02_0015__li179050480593"><span>In the <span class="uicontrol" id="gaussdb_02_0015__uicontrol745417823115"><b>Network Information</b></span> area, click <strong id="gaussdb_02_0015__b945515810312">Bind</strong> in the Private IP Address field.</span></li><li id="gaussdb_02_0015__li16217497116"><span>In the displayed dialog box, select an EIP and click <span class="uicontrol" id="gaussdb_02_0015__uicontrol172191491511"><b>OK</b></span>.</span><p><div class="p" id="gaussdb_02_0015__p197286911113">If no available EIPs are displayed, click <span class="uicontrol" id="gaussdb_02_0015__en-us_topic_0171122739_uicontrol12347172510384_1"><b>View EIP</b></span> and obtain an EIP.<div class="notice" id="gaussdb_02_0015__en-us_topic_0171122739_note105582277381"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_02_0015__en-us_topic_0171122739_p12108153617536">You need to <span class="keyword" id="gaussdb_02_0015__keyword258262795215">configure security group rules</span> and enable specific IP addresses and ports to access the target DB instance. For details, see <a href="gaussdb_02_0013.html">Step 3: Configure Security Group Rules</a>.</p>
<div class="section" id="gaussdb_02_0015__en-us_topic_0171122739_section163851913174310"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_02_0015__en-us_topic_0171122739_ol12603704105129"><li id="gaussdb_02_0015__li114342521119"><span>Log in to the management console.</span></li><li id="gaussdb_02_0015__li243425261113"><span>Click <span><img id="gaussdb_02_0015__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_02_0015__li0435652111111"><span>Click <strong id="gaussdb_02_0015__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_02_0015__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_02_0015__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_02_0015__en-us_topic_0171122739_li193335257385"><span>On the <strong id="gaussdb_02_0015__en-us_topic_0171122739_b84235270615843">Instances</strong> page, click the target DB instance.</span></li><li id="gaussdb_02_0015__li179050480593"><span>In the <span class="uicontrol" id="gaussdb_02_0015__uicontrol745417823115"><b>Network Information</b></span> area, click <strong id="gaussdb_02_0015__b945515810312">Bind</strong> in the Private IP Address field.</span></li><li id="gaussdb_02_0015__li16217497116"><span>In the displayed dialog box, select an EIP and click <span class="uicontrol" id="gaussdb_02_0015__uicontrol172191491511"><b>OK</b></span>.</span><p><div class="p" id="gaussdb_02_0015__p197286911113">If no available EIPs are displayed, click <span class="uicontrol" id="gaussdb_02_0015__en-us_topic_0171122739_uicontrol12347172510384_1"><b>View EIP</b></span> and obtain an EIP.<div class="notice" id="gaussdb_02_0015__en-us_topic_0171122739_note105582277381"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_02_0015__en-us_topic_0171122739_p12108153617536">You need to <span class="keyword" id="gaussdb_02_0015__keyword258262795215">configure security group rules</span> and enable specific IP addresses and ports to access the target DB instance. For details, see <a href="gaussdb_02_0013.html">Step 3: Configure Security Group Rules</a>.</p>
</div></div>
</div>
</p></li><li id="gaussdb_02_0015__en-us_topic_0171122739_li1333620544274"><span>On the <strong id="gaussdb_02_0015__b955374632611">EIPs</strong> page, view the EIP that has been bound to the DB instance.</span></li></ol>

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</div>
<div class="section" id="gaussdb_03_0011__en-us_topic_0171122283_section25123869979"><h4 class="sectiontitle">Prerequisites</h4><ul id="gaussdb_03_0011__en-us_topic_0171122283_ul176448639523"><li id="gaussdb_03_0011__en-us_topic_0171122283_li16430428125916">You have assigned an EIP on the VPC console.</li><li id="gaussdb_03_0011__en-us_topic_0171122283_li199477989523">If a DB instance has already been bound with an EIP, you must unbind the EIP from the DB instance first before binding a new EIP to it.</li></ul>
</div>
<div class="section" id="gaussdb_03_0011__en-us_topic_0171122283_section3199593620428"><a name="gaussdb_03_0011__en-us_topic_0171122283_section3199593620428"></a><a name="en-us_topic_0171122283_section3199593620428"></a><h4 class="sectiontitle">Binding an EIP</h4><ol id="gaussdb_03_0011__en-us_topic_0171122739_ol12603704105129"><li id="gaussdb_03_0011__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0011__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0011__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0011__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0011__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0011__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0011__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0011__en-us_topic_0171122739_li193335257385"><span>On the <strong id="gaussdb_03_0011__b1757818475332">Instance Management</strong> page, click the target DB instance. The <strong id="gaussdb_03_0011__b8324555124719">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_03_0011__li179050480593"><span>In the <span class="uicontrol" id="gaussdb_03_0011__uicontrol31921759125419"><b>Network Information</b></span> area, click <strong id="gaussdb_03_0011__b1019865918549">Bind</strong> in the <strong id="gaussdb_03_0011__b192914516247">Public IP Address (EIP)</strong> field.</span></li><li id="gaussdb_03_0011__li16217497116"><span>In the displayed dialog box, select an EIP and click <span class="uicontrol" id="gaussdb_03_0011__uicontrol325212113419"><b>OK</b></span>.</span><p><div class="p" id="gaussdb_03_0011__p197286911113">If no available EIPs are displayed, click <span class="uicontrol" id="gaussdb_03_0011__uicontrol95400171559"><b>View EIP</b></span> and obtain an EIP.<div class="notice" id="gaussdb_03_0011__en-us_topic_0171122739_note105582277381"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0011__en-us_topic_0171122739_p12108153617536">You need to <span class="keyword" id="gaussdb_03_0011__keyword15791274558">configure security group rules</span> and enable specific IP addresses and ports to access the target DB instance.</p>
<div class="section" id="gaussdb_03_0011__en-us_topic_0171122283_section3199593620428"><a name="gaussdb_03_0011__en-us_topic_0171122283_section3199593620428"></a><a name="en-us_topic_0171122283_section3199593620428"></a><h4 class="sectiontitle">Binding an EIP</h4><ol id="gaussdb_03_0011__en-us_topic_0171122739_ol12603704105129"><li id="gaussdb_03_0011__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0011__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0011__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0011__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0011__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0011__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0011__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0011__en-us_topic_0171122739_li193335257385"><span>On the <strong id="gaussdb_03_0011__b1757818475332">Instances</strong> page, click the target DB instance. The <strong id="gaussdb_03_0011__b8324555124719">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_03_0011__li179050480593"><span>In the <span class="uicontrol" id="gaussdb_03_0011__uicontrol31921759125419"><b>Network Information</b></span> area, click <strong id="gaussdb_03_0011__b1019865918549">Bind</strong> in the <strong id="gaussdb_03_0011__b192914516247">Public IP Address (EIP)</strong> field.</span></li><li id="gaussdb_03_0011__li16217497116"><span>In the displayed dialog box, select an EIP and click <span class="uicontrol" id="gaussdb_03_0011__uicontrol325212113419"><b>OK</b></span>.</span><p><div class="p" id="gaussdb_03_0011__p197286911113">If no available EIPs are displayed, click <span class="uicontrol" id="gaussdb_03_0011__uicontrol95400171559"><b>View EIP</b></span> and obtain an EIP.<div class="notice" id="gaussdb_03_0011__en-us_topic_0171122739_note105582277381"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0011__en-us_topic_0171122739_p12108153617536">You need to <span class="keyword" id="gaussdb_03_0011__keyword15791274558">configure security group rules</span> and enable specific IP addresses and ports to access the target DB instance.</p>
</div></div>
</div>
</p></li><li id="gaussdb_03_0011__en-us_topic_0171122739_li1333620544274"><span>On the <strong id="gaussdb_03_0011__b146071755195513">EIPs</strong> page, view the EIP that has been bound to the DB instance.</span><p><p id="gaussdb_03_0011__en-us_topic_0171122739_p24801631273">To unbind the EIP from the DB instance, see <a href="#gaussdb_03_0011__en-us_topic_0171122283_section186511510267">Unbinding an EIP</a>.</p>

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<div class="section" id="gaussdb_03_0012__section124235101514"><h4 class="sectiontitle">Constraints</h4><p id="gaussdb_03_0012__p1889413620426">The port number of the proxy instance is independent of that of the instance. Changing the port number of the DB instance does not change the port number of the proxy instance.</p>
</div>
<div class="section" id="gaussdb_03_0012__en-us_topic_0171122564_section45421719172826"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0012__en-us_topic_0171122564_ol36506495172844"><li id="gaussdb_03_0012__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0012__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0012__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0012__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0012__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0012__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0012__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0012__en-us_topic_0171122564_li61161897172844"><span>On the <strong id="gaussdb_03_0012__b15894987268">Instance Management</strong> page, click the target DB instance. The <span class="uicontrol" id="gaussdb_03_0012__uicontrol2823104025213"><b>Basic Information</b></span> page is displayed.</span></li><li id="gaussdb_03_0012__en-us_topic_0171122564_li36398892172958"><span>In the <strong id="gaussdb_03_0012__en-us_topic_0171122564_b0841151485715">Network Information</strong> area, click <span><img id="gaussdb_03_0012__image1063335418584" src="en-us_image_0000001352378996.png"></span> in the <span class="uicontrol" id="gaussdb_03_0012__en-us_topic_0171122564_uicontrol1384371465712"><b>Database Port</b></span> field.</span><p><div class="p" id="gaussdb_03_0012__p234195881216">The <span id="gaussdb_03_0012__text1488555137">GaussDB(for MySQL)</span> database port ranges from 1025 to 65534, excluding 5342, 5343, 5344, 5345, 12017, 20000, 20201, and 20202, which are occupied by the system and cannot be used.<ul id="gaussdb_03_0012__ul95201955151215"><li id="gaussdb_03_0012__li951995511217">To submit the change, click <span><img id="gaussdb_03_0012__image1951975517126" src="en-us_image_0000001352538852.png"></span>.<ul id="gaussdb_03_0012__ul851911554120"><li id="gaussdb_03_0012__li9519105501212">In the dialog box, click <strong id="gaussdb_03_0012__en-us_topic_0171122564_b842352706203810">Yes</strong>.<ol type="a" id="gaussdb_03_0012__ol19519355191212"><li id="gaussdb_03_0012__li12519105581211">If you change the database port of a DB instance, the ports of the primary node and read replicas are also changed accordingly and all of them are rebooted.</li><li id="gaussdb_03_0012__li14519125541218">This process takes about 1–5 minutes.</li></ol>
<div class="section" id="gaussdb_03_0012__en-us_topic_0171122564_section45421719172826"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0012__en-us_topic_0171122564_ol36506495172844"><li id="gaussdb_03_0012__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0012__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0012__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0012__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0012__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0012__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0012__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0012__en-us_topic_0171122564_li61161897172844"><span>On the <strong id="gaussdb_03_0012__b15894987268">Instances</strong> page, click the target DB instance. The <span class="uicontrol" id="gaussdb_03_0012__uicontrol2823104025213"><b>Basic Information</b></span> page is displayed.</span></li><li id="gaussdb_03_0012__en-us_topic_0171122564_li36398892172958"><span>In the <strong id="gaussdb_03_0012__en-us_topic_0171122564_b0841151485715">Network Information</strong> area, click <span><img id="gaussdb_03_0012__image1063335418584" src="en-us_image_0000001352378996.png"></span> in the <span class="uicontrol" id="gaussdb_03_0012__en-us_topic_0171122564_uicontrol1384371465712"><b>Database Port</b></span> field.</span><p><div class="p" id="gaussdb_03_0012__p234195881216">The <span id="gaussdb_03_0012__text1488555137">GaussDB(for MySQL)</span> database port ranges from 1025 to 65534, excluding 5342, 5343, 5344, 5345, 12017, 20000, 20201, and 20202, which are occupied by the system and cannot be used.<ul id="gaussdb_03_0012__ul95201955151215"><li id="gaussdb_03_0012__li951995511217">To submit the change, click <span><img id="gaussdb_03_0012__image1951975517126" src="en-us_image_0000001352538852.png"></span>.<ul id="gaussdb_03_0012__ul851911554120"><li id="gaussdb_03_0012__li9519105501212">In the dialog box, click <strong id="gaussdb_03_0012__en-us_topic_0171122564_b842352706203810">Yes</strong>.<ol type="a" id="gaussdb_03_0012__ol19519355191212"><li id="gaussdb_03_0012__li12519105581211">If you change the database port of a DB instance, the ports of the primary node and read replicas are also changed accordingly and all of them are rebooted.</li><li id="gaussdb_03_0012__li14519125541218">This process takes about 1–5 minutes.</li></ol>
</li></ul>
</li><li id="gaussdb_03_0012__li95203556122">To cancel the change, click <span><img id="gaussdb_03_0012__image85201755181216" src="en-us_image_0000001403138693.png"></span>.</li></ul>
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.4.1.3 "><p id="gaussdb_03_0014__p65882554504">applyParameterGroup</p>
</td>
</tr>
<tr id="gaussdb_03_0014__row1032310031014"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.4.1.1 "><p id="gaussdb_03_0014__p113232015107">Deleting a task from the task center</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.4.1.2 "><p id="gaussdb_03_0014__p20323130131018">job</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.4.1.3 "><p id="gaussdb_03_0014__p1032315091013">deleteTaskCenterJob</p>
</td>
</tr>
</tbody>
</table>
</div>

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<h1 class="topictitle1">Viewing Error Logs</h1>
<div id="body8662426"><p id="gaussdb_03_0018__en-us_topic_0171122292_p46611462183014"><span id="gaussdb_03_0018__text105701313103616">GaussDB(for MySQL)</span> log management allows you to view database-level logs, including error logs and slow SQL query logs.</p>
<div class="section" id="gaussdb_03_0018__en-us_topic_0171122292_s709632a0b9ab4a63992268328887e81c"><h4 class="sectiontitle">Viewing Log Details</h4><ol id="gaussdb_03_0018__en-us_topic_0171122292_o8947fe58449a4661be32760540f4d928"><li id="gaussdb_03_0018__li427521291312"><span>Log in to the management console.</span></li><li id="gaussdb_03_0018__li152751123137"><span>Click <span><img id="gaussdb_03_0018__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0018__li112751012151319"><span>Click <strong id="gaussdb_03_0018__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0018__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0018__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0018__en-us_topic_0171122292_l91d16c8ad21e4b1dbc8f2448007ca62c"><span>On the <strong id="gaussdb_03_0018__en-us_topic_0171122292_b84235270615843">Instance Management</strong> page, click the target DB instance. The <strong id="gaussdb_03_0018__b5530104718267">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_03_0018__li174993116615"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_03_0018__uicontrol95807129234"><b>Logs</b></span>. </span></li><li id="gaussdb_03_0018__en-us_topic_0171122292_li4999142231010"><span>On the <strong id="gaussdb_03_0018__b051014451238">Error Logs</strong> page, select a node and view the error log details of the node, including:</span><p><ul id="gaussdb_03_0018__en-us_topic_0171122292_ul98461942172115"><li id="gaussdb_03_0018__li3097579594147">Error logs in different time periods</li><li id="gaussdb_03_0018__en-us_topic_0171122292_li75911913191411">Error logs of the following levels:<ul id="gaussdb_03_0018__en-us_topic_0171122292_ul81141425182418"><li id="gaussdb_03_0018__li66912385912">ALL</li><li id="gaussdb_03_0018__li52707113916">INFO</li><li id="gaussdb_03_0018__li65781618594">WARNING</li><li id="gaussdb_03_0018__en-us_topic_0171122292_li111412516246">ERROR</li><li id="gaussdb_03_0018__en-us_topic_0171122292_li121141725152418">FATAL</li><li id="gaussdb_03_0018__li1716119322916">NOTE</li></ul>
<div class="section" id="gaussdb_03_0018__en-us_topic_0171122292_s709632a0b9ab4a63992268328887e81c"><h4 class="sectiontitle">Viewing Log Details</h4><ol id="gaussdb_03_0018__en-us_topic_0171122292_o8947fe58449a4661be32760540f4d928"><li id="gaussdb_03_0018__li427521291312"><span>Log in to the management console.</span></li><li id="gaussdb_03_0018__li152751123137"><span>Click <span><img id="gaussdb_03_0018__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0018__li112751012151319"><span>Click <strong id="gaussdb_03_0018__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0018__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0018__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0018__en-us_topic_0171122292_l91d16c8ad21e4b1dbc8f2448007ca62c"><span>On the <strong id="gaussdb_03_0018__en-us_topic_0171122292_b84235270615843">Instances</strong> page, click the target DB instance. The <strong id="gaussdb_03_0018__b5530104718267">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_03_0018__li174993116615"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_03_0018__uicontrol95807129234"><b>Logs</b></span>. </span></li><li id="gaussdb_03_0018__en-us_topic_0171122292_li4999142231010"><span>On the <strong id="gaussdb_03_0018__b051014451238">Error Logs</strong> page, select a node and view the error log details of the node, including:</span><p><ul id="gaussdb_03_0018__en-us_topic_0171122292_ul98461942172115"><li id="gaussdb_03_0018__li3097579594147">Error logs in different time periods</li><li id="gaussdb_03_0018__en-us_topic_0171122292_li75911913191411">Error logs of the following levels:<ul id="gaussdb_03_0018__en-us_topic_0171122292_ul81141425182418"><li id="gaussdb_03_0018__li66912385912">ALL</li><li id="gaussdb_03_0018__li52707113916">INFO</li><li id="gaussdb_03_0018__li65781618594">WARNING</li><li id="gaussdb_03_0018__en-us_topic_0171122292_li111412516246">ERROR</li><li id="gaussdb_03_0018__en-us_topic_0171122292_li121141725152418">FATAL</li><li id="gaussdb_03_0018__li1716119322916">NOTE</li></ul>
</li></ul>
</p></li></ol>
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<div class="p" id="gaussdb_03_0019__en-us_topic_0171122308_p1036918352521"><span id="gaussdb_03_0019__text1612538304">GaussDB(for MySQL)</span> supports the following statement types:<ul id="gaussdb_03_0019__en-us_topic_0171122308_ul15606971754"><li id="gaussdb_03_0019__en-us_topic_0171122308_li36061471155">SELECT</li><li id="gaussdb_03_0019__en-us_topic_0171122308_li56061171254">INSERT</li><li id="gaussdb_03_0019__en-us_topic_0171122308_li760677251">UPDATE</li><li id="gaussdb_03_0019__en-us_topic_0171122308_li96061771453">DELETE</li><li id="gaussdb_03_0019__en-us_topic_0171122308_li14606197250">CREATE</li><li id="gaussdb_03_0019__li6985466186">ALTER</li><li id="gaussdb_03_0019__li19969912131812">DROP</li></ul>
</div>
</div>
<div class="section" id="gaussdb_03_0019__en-us_topic_0171122308_section467223910567"><h4 class="sectiontitle">Viewing Log Details</h4><ol id="gaussdb_03_0019__en-us_topic_0171122308_ol105901371552"><li id="gaussdb_03_0019__li23934243136"><span>Log in to the management console.</span></li><li id="gaussdb_03_0019__li83931424131319"><span>Click <span><img id="gaussdb_03_0019__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0019__li19393172461312"><span>Click <strong id="gaussdb_03_0019__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0019__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0019__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0019__en-us_topic_0171122308_li76061771959"><span>On the <strong id="gaussdb_03_0019__b24892018122411">Instance Management</strong> page, click the target DB instance. The <strong id="gaussdb_03_0019__b164891518152414">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_03_0019__li174993116615"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_03_0019__uicontrol12771248172613"><b>Logs</b></span>. </span></li><li id="gaussdb_03_0019__en-us_topic_0171122308_li99031629175618"><span>On the <span class="uicontrol" id="gaussdb_03_0019__uicontrol173860614315933"><b>Slow Query Logs</b></span> page, view the slow query log details.</span><p><p id="gaussdb_03_0019__en-us_topic_0171122308_p45752226577">You can view the slow query log records of a specified execution statement type or a specific time period.</p>
<div class="section" id="gaussdb_03_0019__en-us_topic_0171122308_section467223910567"><h4 class="sectiontitle">Viewing Log Details</h4><ol id="gaussdb_03_0019__en-us_topic_0171122308_ol105901371552"><li id="gaussdb_03_0019__li23934243136"><span>Log in to the management console.</span></li><li id="gaussdb_03_0019__li83931424131319"><span>Click <span><img id="gaussdb_03_0019__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0019__li19393172461312"><span>Click <strong id="gaussdb_03_0019__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0019__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0019__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0019__en-us_topic_0171122308_li76061771959"><span>On the <strong id="gaussdb_03_0019__b24892018122411">Instances</strong> page, click the target DB instance. The <strong id="gaussdb_03_0019__b164891518152414">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_03_0019__li174993116615"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_03_0019__uicontrol12771248172613"><b>Logs</b></span>. </span></li><li id="gaussdb_03_0019__en-us_topic_0171122308_li99031629175618"><span>On the <span class="uicontrol" id="gaussdb_03_0019__uicontrol173860614315933"><b>Slow Query Logs</b></span> page, view the slow query log details.</span><p><p id="gaussdb_03_0019__en-us_topic_0171122308_p45752226577">You can view the slow query log records of a specified execution statement type or a specific time period.</p>
</p></li></ol>
</div>
</div>

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<a name="gaussdb_03_0032"></a><a name="gaussdb_03_0032"></a>
<h1 class="topictitle1">Changing a DB Instance Name</h1>
<div id="body8662426"><div class="section" id="gaussdb_03_0032__en-us_topic_0171122553_section241540814823"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_03_0032__en-us_topic_0171122553_p4215797114827">You can change the name of a <span id="gaussdb_03_0032__text261038437">GaussDB(for MySQL)</span> DB instance.</p>
<div id="body8662426"><div class="section" id="gaussdb_03_0032__en-us_topic_0171122553_section241540814823"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_03_0032__en-us_topic_0171122553_p4215797114827">You can change the name of a <span id="gaussdb_03_0032__text105701313103616">GaussDB(for MySQL)</span> DB instance.</p>
</div>
<div class="section" id="gaussdb_03_0032__en-us_topic_0171122553_section45421719172826"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0032__en-us_topic_0171122553_ol36506495172844"><li id="gaussdb_03_0032__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0032__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0032__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0032__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0032__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0032__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0032__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0032__en-us_topic_0171122553_li39994717339"><span>On the <strong id="gaussdb_03_0032__en-us_topic_0171122553_b925410293573">Instance Management</strong> page, locate the target DB instance and click <span><img id="gaussdb_03_0032__image1063335418584" src="en-us_image_0000001402858869.png"></span> next to it to edit the DB instance name. Then, click <strong id="gaussdb_03_0032__en-us_topic_0171122553_b147091914491">OK</strong>.</span><p><p id="gaussdb_03_0032__en-us_topic_0171122553_p490410427365">The DB instance name must start with a letter and consist of 4 to 64 characters. Only uppercase letters, lowercase letters, digits, hyphens (-), and underscores (_) are allowed.</p>
<ul id="gaussdb_03_0032__en-us_topic_0171122553_ul9404737113613"><li id="gaussdb_03_0032__en-us_topic_0171122553_li639133082019">To submit the change, click <span class="uicontrol" id="gaussdb_03_0032__uicontrol3941134332210"><b>OK</b></span>.</li><li id="gaussdb_03_0032__en-us_topic_0171122553_li1273310291449">To cancel the change, click <span class="uicontrol" id="gaussdb_03_0032__uicontrol521001152311"><b>Cancel</b></span>.</li></ul>
<div class="section" id="gaussdb_03_0032__en-us_topic_0171122553_section45421719172826"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0032__en-us_topic_0171122553_ol36506495172844"><li id="gaussdb_03_0032__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0032__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0032__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0032__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0032__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0032__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0032__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0032__en-us_topic_0171122553_li39994717339"><span>On the <strong id="gaussdb_03_0032__b8639575516">Instances</strong> page, locate the instance name and click <span><img id="gaussdb_03_0032__image10639972055" src="en-us_image_0000001402858869.png"></span> in the <strong id="gaussdb_03_0032__b86391771059">Name/ID</strong> column to edit the instance name.</span><p><ul id="gaussdb_03_0032__ul1090918523514"><li id="gaussdb_03_0032__li1290911521851">The DB instance name must start with a letter and consist of 4 to 64 characters. Only uppercase letters, lowercase letters, digits, hyphens (-), and underscores (_) are allowed.</li><li id="gaussdb_03_0032__li890919526510">When changing the instance name, you can determine whether to select <span class="uicontrol" id="gaussdb_03_0032__uicontrol192222462913"><b>Change node names synchronously</b></span> as required. If this option is selected, the names of the corresponding nodes are changed when the instance name is changed. If this option is not selected, only the instance name is changed, and the corresponding node names are not changed.</li><li id="gaussdb_03_0032__li2909552157">If you want to submit the change, click <strong id="gaussdb_03_0032__b1448511371230">OK</strong>. If you want to cancel the change, click <strong id="gaussdb_03_0032__b07143122413">Cancel</strong>.</li></ul>
</p></li><li id="gaussdb_03_0032__en-us_topic_0171122553_li7163133174316"><span>View the result of the change on the <span class="uicontrol" id="gaussdb_03_0032__en-us_topic_0171122553_uicontrol920993936193611"><b>Basic Information</b></span> page.</span></li></ol>
</div>
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</div>
<div class="notice" id="gaussdb_03_0040__en-us_topic_0171122427_note23420379111411"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><ul id="gaussdb_03_0040__en-us_topic_0171122427_ul4946142414619"><li id="gaussdb_03_0040__en-us_topic_0171122427_li16830644124612">Your database may be unavailable if, for example, data is being backed up or there are modifications being made.</li><li id="gaussdb_03_0040__en-us_topic_0171122427_li16946142419463">Rebooting a DB instance will cause service interruption. During this period, the DB instance status is <span class="uicontrol" id="gaussdb_03_0040__en-us_topic_0171122427_uicontrol1202673074172227"><b>Rebooting</b></span>.</li><li id="gaussdb_03_0040__en-us_topic_0171122427_li14400547162211">DB instances are not available when being rebooted. After the reboot completes, the cached memory will be automatically cleared. The DB instance needs to be warmed up to prevent congestion during peak hours.</li></ul>
</div></div>
<div class="section" id="gaussdb_03_0040__en-us_topic_0171122427_s22e3edfb1cdd4405b64cad650a1cf9a0"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0040__en-us_topic_0171122427_o2173078bb42c41a0b711d64c49e2565d"><li id="gaussdb_03_0040__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0040__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0040__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0040__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0040__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0040__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0040__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0040__en-us_topic_0171122427_l6b462da2019b41cd87b384de44f2bcc9"><span>On the <strong id="gaussdb_03_0040__b2353537114618">Instance Management</strong> page, locate the target DB instance and choose <span class="menucascade" id="gaussdb_03_0040__menucascade04919552354"><b><span class="uicontrol" id="gaussdb_03_0040__uicontrol0490125563511">More</span></b> &gt; <b><span class="uicontrol" id="gaussdb_03_0040__uicontrol849135518352">Reboot</span></b></span> in the <strong id="gaussdb_03_0040__b1649219551351">Operation</strong> column.</span><p><p id="gaussdb_03_0040__en-us_topic_0171122427_p145731244163811">Alternatively, click the target DB instance. On the displayed page, click <strong id="gaussdb_03_0040__en-us_topic_0171122427_b1181712376213">Reboot</strong> in the upper right corner of the page.</p>
<div class="section" id="gaussdb_03_0040__en-us_topic_0171122427_s22e3edfb1cdd4405b64cad650a1cf9a0"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0040__en-us_topic_0171122427_o2173078bb42c41a0b711d64c49e2565d"><li id="gaussdb_03_0040__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0040__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0040__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0040__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0040__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0040__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0040__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0040__en-us_topic_0171122427_l6b462da2019b41cd87b384de44f2bcc9"><span>On the <strong id="gaussdb_03_0040__b2353537114618">Instances</strong> page, locate the target DB instance and choose <span class="menucascade" id="gaussdb_03_0040__menucascade04919552354"><b><span class="uicontrol" id="gaussdb_03_0040__uicontrol0490125563511">More</span></b> &gt; <b><span class="uicontrol" id="gaussdb_03_0040__uicontrol849135518352">Reboot</span></b></span> in the <strong id="gaussdb_03_0040__b1649219551351">Operation</strong> column.</span><p><p id="gaussdb_03_0040__en-us_topic_0171122427_p145731244163811">Alternatively, click the target DB instance. On the displayed page, click <strong id="gaussdb_03_0040__en-us_topic_0171122427_b1181712376213">Reboot</strong> in the upper right corner of the page.</p>
<p id="gaussdb_03_0040__en-us_topic_0171122427_p695624210389">The read replicas are also rebooted.</p>
</p></li><li id="gaussdb_03_0040__en-us_topic_0171122427_l6d35af1958874f2bb67501ccf04f2079"><span>In the displayed <span class="uicontrol" id="gaussdb_03_0040__en-us_topic_0171122427_uicontrol145364557593"><b>Reboot DB Instance</b></span> dialog box, click <span class="uicontrol" id="gaussdb_03_0040__en-us_topic_0171122427_uicontrol175371655125918"><b>Yes</b></span>.</span></li><li id="gaussdb_03_0040__en-us_topic_0171122427_li53158765111855"><span>Refresh the DB instance list and view the status of the DB instance. If its status is <strong id="gaussdb_03_0040__en-us_topic_0171122427_b842352706165735">Available</strong>, it has rebooted successfully.</span></li></ol>
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<h1 class="topictitle1">Exporting DB Instance Information</h1>
<div id="body8662426"><div class="section" id="gaussdb_03_0045__en-us_topic_0171122327_section17375927183"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_03_0045__en-us_topic_0171122327_p16289929784">You can <span class="keyword" id="gaussdb_03_0045__en-us_topic_0171122327_keyword13319134918109">export a DB instance</span> list (containing all or selected DB instances) to view and analyze DB instance information.</p>
</div>
<div class="section" id="gaussdb_03_0045__en-us_topic_0171122327_section2855205020292"><h4 class="sectiontitle">Exporting Information About All DB Instances</h4><ol id="gaussdb_03_0045__en-us_topic_0171122327_ol181214526292"><li id="gaussdb_03_0045__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0045__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0045__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0045__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0045__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122327_li10812195211293"><span>On the <strong id="gaussdb_03_0045__en-us_topic_0171122327_b842352706191733">Instance Management</strong> page, click <span><img id="gaussdb_03_0045__image42062059161516" src="en-us_image_0000001403138737.png"></span> in the upper right corner of the page. In the displayed dialog box, select the items to be exported and click <span class="uicontrol" id="gaussdb_03_0045__en-us_topic_0171122327_uicontrol1674773893191920"><b>Export</b></span>.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122327_li17812205262919"><span>After the export task is complete, a .csv file is generated locally.</span></li></ol>
<div class="section" id="gaussdb_03_0045__en-us_topic_0171122327_section2855205020292"><h4 class="sectiontitle">Exporting Information About All DB Instances</h4><ol id="gaussdb_03_0045__en-us_topic_0171122327_ol181214526292"><li id="gaussdb_03_0045__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0045__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0045__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0045__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0045__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122327_li10812195211293"><span>On the <strong id="gaussdb_03_0045__en-us_topic_0171122327_b842352706191733">Instances</strong> page, click <span><img id="gaussdb_03_0045__image42062059161516" src="en-us_image_0000001403138737.png"></span> in the upper right corner of the page. In the displayed dialog box, select the items to be exported and click <span class="uicontrol" id="gaussdb_03_0045__en-us_topic_0171122327_uicontrol1674773893191920"><b>Export</b></span>.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122327_li17812205262919"><span>After the export task is complete, a .csv file is generated locally.</span></li></ol>
</div>
<div class="section" id="gaussdb_03_0045__en-us_topic_0171122327_section069716213575"><h4 class="sectiontitle">Exporting Information About Selected DB Instances</h4><ol id="gaussdb_03_0045__en-us_topic_0171122327_ol97541855161520"><li id="gaussdb_03_0045__li15910175216174"><span>Log in to the management console.</span></li><li id="gaussdb_03_0045__li129101152191719"><span>Click <span><img id="gaussdb_03_0045__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0045__li10910125231715"><span>Click <strong id="gaussdb_03_0045__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_03_0045__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_03_0045__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122327_li18677141231919"><span>On the <strong id="gaussdb_03_0045__b1562105641420">Instance Management</strong> page, select the DB instances to be exported and click <span><img id="gaussdb_03_0045__image13390101717163" src="en-us_image_0000001352379048.png"></span> in the upper right corner of the page. In the displayed dialog box, select the items to be exported and click <span class="uicontrol" id="gaussdb_03_0045__uicontrol195631556101419"><b>Export</b></span>.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122327_li325751518279"><span>After the export task is complete, a .csv file is generated locally.</span></li></ol>
<div class="section" id="gaussdb_03_0045__en-us_topic_0171122327_section069716213575"><h4 class="sectiontitle">Exporting Information About Selected DB Instances</h4><ol id="gaussdb_03_0045__en-us_topic_0171122327_ol97541855161520"><li id="gaussdb_03_0045__li15910175216174"><span>Log in to the management console.</span></li><li id="gaussdb_03_0045__li129101152191719"><span>Click <span><img id="gaussdb_03_0045__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0045__li10910125231715"><span>Click <strong id="gaussdb_03_0045__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_03_0045__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_03_0045__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122327_li18677141231919"><span>On the <strong id="gaussdb_03_0045__b1562105641420">Instances </strong>page, select the DB instances to be exported and click <span><img id="gaussdb_03_0045__image13390101717163" src="en-us_image_0000001352379048.png"></span> in the upper right corner of the page. In the displayed dialog box, select the items to be exported and click <span class="uicontrol" id="gaussdb_03_0045__uicontrol195631556101419"><b>Export</b></span>.</span></li><li id="gaussdb_03_0045__en-us_topic_0171122327_li325751518279"><span>After the export task is complete, a .csv file is generated locally.</span></li></ol>
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<a name="gaussdb_03_0047"></a><a name="gaussdb_03_0047"></a>
<h1 class="topictitle1">Deleting a DB Instance</h1>
<div id="body8662426"><div class="section" id="gaussdb_03_0047__en-us_topic_0171122319_section50920834194327"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_03_0047__p1979135418384">You can manually delete a DB instance on the <strong id="gaussdb_03_0047__en-us_topic_0171122319_b0561183473316">Instance Management</strong> page.</p>
<div id="body8662426"><div class="section" id="gaussdb_03_0047__en-us_topic_0171122319_section50920834194327"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_03_0047__p1979135418384">You can manually delete a DB instance on the <strong id="gaussdb_03_0047__en-us_topic_0171122319_b0561183473316">Instances</strong> page.</p>
<div class="notice" id="gaussdb_03_0047__en-us_topic_0171122319_note291218261084"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><ul id="gaussdb_03_0047__en-us_topic_0171122319_ul165538321387"><li id="gaussdb_03_0047__en-us_topic_0171122319_li238414420475">If you delete a DB instance, the read replicas associated with it are also deleted.</li><li id="gaussdb_03_0047__en-us_topic_0171122319_li963411112308">Deleted DB instances cannot be recovered. Exercise caution when performing this operation.</li></ul>
</div></div>
</div>
<div class="section" id="gaussdb_03_0047__section14137132581213"><h4 class="sectiontitle">Constraints</h4><ul id="gaussdb_03_0047__en-us_topic_0171122319_ul1098915407426"><li id="gaussdb_03_0047__en-us_topic_0171122319_li18506142104210">DB instances cannot be deleted when operations are being performed on them. They can be deleted only after the operations are completed.</li><li id="gaussdb_03_0047__en-us_topic_0171122319_li20785257288">If you delete a DB instance, its automated backups are also deleted and you are no longer charged for them. Manual backups are still retained and will incur additional costs.</li></ul>
</div>
<div class="section" id="gaussdb_03_0047__en-us_topic_0171122319_section1011433142919"><h4 class="sectiontitle"><span class="keyword" id="gaussdb_03_0047__en-us_topic_0171122319_keyword1656972221017">Procedure</span></h4><ol id="gaussdb_03_0047__en-us_topic_0171122319_oa004d58aa8da4fdfbebf702690153c24"><li id="gaussdb_03_0047__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0047__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0047__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0047__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0047__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0047__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0047__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0047__li9438181012567"><span>On the <strong id="gaussdb_03_0047__en-us_topic_0171122319_b15540931759">Instance Management</strong> page, locate the DB instance to be deleted and click <strong id="gaussdb_03_0047__en-us_topic_0171122319_b12514174111518">More</strong> &gt; <strong id="gaussdb_03_0047__en-us_topic_0171122319_b1480745150">Delete</strong> in the <strong id="gaussdb_03_0047__en-us_topic_0171122319_b811917483513">Operation</strong> column.</span></li><li id="gaussdb_03_0047__en-us_topic_0171122319_l601f793a4dcf4f50ba3417ee838b53ed"><span>In the displayed dialog box, click <span class="parmname" id="gaussdb_03_0047__en-us_topic_0171122319_parmname1821530147203536"><b>Yes</b></span>. Refresh the <strong id="gaussdb_03_0047__en-us_topic_0171122319_b84235270691741">Instance Management</strong> page later to check that the deletion is successful.</span></li></ol>
<div class="section" id="gaussdb_03_0047__en-us_topic_0171122319_section1011433142919"><h4 class="sectiontitle"><span class="keyword" id="gaussdb_03_0047__en-us_topic_0171122319_keyword1656972221017">Procedure</span></h4><ol id="gaussdb_03_0047__en-us_topic_0171122319_oa004d58aa8da4fdfbebf702690153c24"><li id="gaussdb_03_0047__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0047__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0047__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0047__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0047__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0047__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0047__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0047__li9438181012567"><span>On the <strong id="gaussdb_03_0047__en-us_topic_0171122319_b15540931759">Instances</strong> page, locate the DB instance to be deleted and click <strong id="gaussdb_03_0047__en-us_topic_0171122319_b12514174111518">More</strong> &gt; <strong id="gaussdb_03_0047__en-us_topic_0171122319_b1480745150">Delete</strong> in the <strong id="gaussdb_03_0047__en-us_topic_0171122319_b811917483513">Operation</strong> column.</span></li><li id="gaussdb_03_0047__en-us_topic_0171122319_l601f793a4dcf4f50ba3417ee838b53ed"><span>In the displayed dialog box, click <span class="parmname" id="gaussdb_03_0047__en-us_topic_0171122319_parmname1821530147203536"><b>Yes</b></span>. Refresh the <strong id="gaussdb_03_0047__en-us_topic_0171122319_b84235270691741">Instances </strong>page later to check that the deletion is successful.</span></li></ol>
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<ul id="gaussdb_03_0051__en-us_topic_0171122716_ul1744164793746"><li id="gaussdb_03_0051__en-us_topic_0171122716_li2843959693746">The database port is being changed.</li><li id="gaussdb_03_0051__en-us_topic_0171122716_li2224264093746">The instance status is <strong id="gaussdb_03_0051__b1972438685">Creating</strong>, <strong id="gaussdb_03_0051__b397213816810">Restoring</strong>, <strong id="gaussdb_03_0051__b297223812817">Rebooting</strong>, <strong id="gaussdb_03_0051__b209721238185">Changing port</strong>, <strong id="gaussdb_03_0051__b39735381783">Changing instance class</strong>, <strong id="gaussdb_03_0051__b33094396223">Promoting to primary</strong>, or <strong id="gaussdb_03_0051__b187261740162219">Abnormal</strong>.</li></ul>
<div class="section" id="gaussdb_03_0051__en-us_topic_0171122716_section5252821142215"><h4 class="sectiontitle">Precautions</h4><ul id="gaussdb_03_0051__en-us_topic_0171122716_ul1082143010223"><li id="gaussdb_03_0051__en-us_topic_0171122716_li68273032214">If you change the administrator password of a DB instance, the passwords of the read replicas associated with the DB instance are also changed accordingly.</li><li id="gaussdb_03_0051__en-us_topic_0171122716_li48223011224">The length of time it takes for the new password to take effect depends on the amount of service data currently being processed by the primary node.</li><li id="gaussdb_03_0051__en-us_topic_0171122716_li168216302225">To prevent brute force cracking and ensure system security, change your password periodically, such as every three or six months.</li></ul>
</div>
<div class="section" id="gaussdb_03_0051__en-us_topic_0171122716_section59807924105129"><h4 class="sectiontitle">Method 1</h4><ol id="gaussdb_03_0051__en-us_topic_0171122716_ol12603704105129"><li id="gaussdb_03_0051__li11111185020914"><span>Log in to the management console.</span></li><li id="gaussdb_03_0051__li1511135012918"><span>Click <span><img id="gaussdb_03_0051__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0051__li17111250492"><span>Click <strong id="gaussdb_03_0051__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0051__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0051__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0051__en-us_topic_0171122716_li46324476105129"><span>On the <span class="parmname" id="gaussdb_03_0051__en-us_topic_0171122716_parmname7696479058465"><b>Instance Management</b></span> page, locate the target DB instance and choose <span class="menucascade" id="gaussdb_03_0051__en-us_topic_0171122716_menucascade42374616584621"><b><span class="uicontrol" id="gaussdb_03_0051__uicontrol44568043584621">More</span></b> &gt; <b><span class="uicontrol" id="gaussdb_03_0051__uicontrol40620853084621">Reset Password</span></b></span> in the <strong id="gaussdb_03_0051__en-us_topic_0171122716_b8423527069439">Operation</strong> column.</span></li><li id="gaussdb_03_0051__en-us_topic_0171122716_li14267104105129"><span>Enter a new password and confirm the password.</span><p><div class="notice" id="gaussdb_03_0051__en-us_topic_0171122716_note529322592414"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0051__en-us_topic_0171122716_p72930251247">Keep this password secure. The system cannot retrieve it.</p>
<div class="section" id="gaussdb_03_0051__en-us_topic_0171122716_section59807924105129"><h4 class="sectiontitle">Method 1</h4><ol id="gaussdb_03_0051__en-us_topic_0171122716_ol12603704105129"><li id="gaussdb_03_0051__li11111185020914"><span>Log in to the management console.</span></li><li id="gaussdb_03_0051__li1511135012918"><span>Click <span><img id="gaussdb_03_0051__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0051__li17111250492"><span>Click <strong id="gaussdb_03_0051__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0051__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0051__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0051__en-us_topic_0171122716_li46324476105129"><span>On the <span class="parmname" id="gaussdb_03_0051__en-us_topic_0171122716_parmname7696479058465"><b>Instances</b></span> page, locate the target DB instance and choose <span class="menucascade" id="gaussdb_03_0051__en-us_topic_0171122716_menucascade42374616584621"><b><span class="uicontrol" id="gaussdb_03_0051__uicontrol44568043584621">More</span></b> &gt; <b><span class="uicontrol" id="gaussdb_03_0051__uicontrol40620853084621">Reset Password</span></b></span> in the <strong id="gaussdb_03_0051__en-us_topic_0171122716_b8423527069439">Operation</strong> column.</span></li><li id="gaussdb_03_0051__en-us_topic_0171122716_li14267104105129"><span>Enter a new password and confirm the password.</span><p><div class="notice" id="gaussdb_03_0051__en-us_topic_0171122716_note529322592414"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0051__en-us_topic_0171122716_p72930251247">Keep this password secure. The system cannot retrieve it.</p>
</div></div>
<p id="gaussdb_03_0051__p156517561177">The new password must consist of 8 to 32 characters and contain at least three of the following: uppercase letters, lowercase letters, digits, and special characters (~!@#%^*-_=+?). Enter a strong password and periodically change it to improve security, preventing security risks such as brute force cracking.</p>
<ul id="gaussdb_03_0051__en-us_topic_0171122716_ul564019271245"><li id="gaussdb_03_0051__en-us_topic_0171122716_li4640192716419">To submit the new password, click <strong id="gaussdb_03_0051__en-us_topic_0171122716_b84235270695330_3">OK</strong>.</li><li id="gaussdb_03_0051__en-us_topic_0171122716_li196401127643">To cancel the reset, click <strong id="gaussdb_03_0051__en-us_topic_0171122716_b84235270620484_1">Cancel</strong>.</li></ul>
</p></li></ol>
</div>
<div class="section" id="gaussdb_03_0051__en-us_topic_0171122716_section4206283114638"><h4 class="sectiontitle">Method 2</h4><ol id="gaussdb_03_0051__en-us_topic_0171122716_ol796760111472"><li id="gaussdb_03_0051__li173781619194310"><span>Log in to the management console.</span></li><li id="gaussdb_03_0051__li11378121915437"><span>Click <span><img id="gaussdb_03_0051__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0051__li03781619114316"><span>Click <strong id="gaussdb_03_0051__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_03_0051__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_03_0051__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_03_0051__en-us_topic_0171122716_li61161897172844"><span>On the <strong id="gaussdb_03_0051__en-us_topic_0171122716_b84235270615219">Instance Management</strong> page, click the target DB instance. The <strong id="gaussdb_03_0051__b148841556162511">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_03_0051__en-us_topic_0171122716_li36398892172958"><span>In the <strong id="gaussdb_03_0051__en-us_topic_0171122716_b836692819435">DB Instance Information</strong> area, click <strong id="gaussdb_03_0051__en-us_topic_0171122716_b438316281431">Reset Password</strong> in the <span class="uicontrol" id="gaussdb_03_0051__en-us_topic_0171122716_uicontrol12384628124315"><b>Administrator</b></span> field. In the displayed dialog box, enter a new password and confirm the password.</span><p><div class="notice" id="gaussdb_03_0051__en-us_topic_0171122716_note5427133210139"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0051__en-us_topic_0178839218_en-us_topic_0171122716_p72930251247">Keep this password secure. The system cannot retrieve it.</p>
<div class="section" id="gaussdb_03_0051__en-us_topic_0171122716_section4206283114638"><h4 class="sectiontitle">Method 2</h4><ol id="gaussdb_03_0051__en-us_topic_0171122716_ol796760111472"><li id="gaussdb_03_0051__li173781619194310"><span>Log in to the management console.</span></li><li id="gaussdb_03_0051__li11378121915437"><span>Click <span><img id="gaussdb_03_0051__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0051__li03781619114316"><span>Click <strong id="gaussdb_03_0051__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_03_0051__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_03_0051__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_03_0051__en-us_topic_0171122716_li61161897172844"><span>On the <strong id="gaussdb_03_0051__en-us_topic_0171122716_b84235270615219">Instances</strong> page, click the target DB instance. The <strong id="gaussdb_03_0051__b148841556162511">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_03_0051__en-us_topic_0171122716_li36398892172958"><span>In the <strong id="gaussdb_03_0051__en-us_topic_0171122716_b836692819435">DB Instance Information</strong> area, click <strong id="gaussdb_03_0051__en-us_topic_0171122716_b438316281431">Reset Password</strong> in the <span class="uicontrol" id="gaussdb_03_0051__en-us_topic_0171122716_uicontrol12384628124315"><b>Administrator</b></span> field. In the displayed dialog box, enter a new password and confirm the password.</span><p><div class="notice" id="gaussdb_03_0051__en-us_topic_0171122716_note5427133210139"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0051__en-us_topic_0178839218_en-us_topic_0171122716_p72930251247">Keep this password secure. The system cannot retrieve it.</p>
</div></div>
<div class="p" id="gaussdb_03_0051__p195599214122">The new password must consist of 8 to 32 characters and contain at least three of the following: uppercase letters, lowercase letters, digits, and special characters (~!@#%^*-_=+?). Enter a strong password and periodically change it to improve security, preventing security risks such as brute force cracking.<ul id="gaussdb_03_0051__en-us_topic_0178839218_en-us_topic_0171122716_ul564019271245"><li id="gaussdb_03_0051__en-us_topic_0178839218_en-us_topic_0171122716_li4640192716419">To submit the new password, click <strong id="gaussdb_03_0051__b374822197">OK</strong>.</li><li id="gaussdb_03_0051__en-us_topic_0178839218_en-us_topic_0171122716_li196401127643">To cancel the reset, click <strong id="gaussdb_03_0051__b1529299529">Cancel</strong>.</li></ul>
<div class="p" id="gaussdb_03_0051__p195599214122">The new password must consist of 8 to 32 characters and contain at least three of the following: uppercase letters, lowercase letters, digits, and special characters (~!@#%^*-_=+?). Enter a strong password and periodically change it to improve security, preventing security risks such as brute force cracking.<ul id="gaussdb_03_0051__en-us_topic_0178839218_en-us_topic_0171122716_ul564019271245"><li id="gaussdb_03_0051__en-us_topic_0178839218_en-us_topic_0171122716_li4640192716419">To submit the new password, click <strong id="gaussdb_03_0051__b117855002">OK</strong>.</li><li id="gaussdb_03_0051__en-us_topic_0178839218_en-us_topic_0171122716_li196401127643">To cancel the reset, click <strong id="gaussdb_03_0051__b1737428028">Cancel</strong>.</li></ul>
</div>
</p></li></ol>
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<div id="body8662426"><div class="section" id="gaussdb_03_0058__en-us_topic_0171122845_section387888031450"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_03_0058__en-us_topic_0171122845_p4192281217036"><span id="gaussdb_03_0058__text105701313103616">GaussDB(for MySQL)</span> allows you to <span class="keyword" id="gaussdb_03_0058__keyword15962012418">create manual backups</span> for available primary nodes. You can restore data from backups to ensure data reliability.</p>
<ul id="gaussdb_03_0058__ul48453242410"><li id="gaussdb_03_0058__li38410328244">When you delete a DB instance, its automated backups are also deleted but its manual backups are retained.</li></ul>
</div>
<div class="section" id="gaussdb_03_0058__en-us_topic_0171122845_section3535102285710"><h4 class="sectiontitle">Method 1</h4><ol id="gaussdb_03_0058__en-us_topic_0171122845_o2173078bb42c41a0b711d64c49e2565d"><li id="gaussdb_03_0058__li1370755351020"><span>Log in to the management console.</span></li><li id="gaussdb_03_0058__li15708115351019"><span>Click <span><img id="gaussdb_03_0058__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0058__li27086537104"><span>Click <strong id="gaussdb_03_0058__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0058__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0058__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122845_l6b462da2019b41cd87b384de44f2bcc9"><span>On the <span class="uicontrol" id="gaussdb_03_0058__en-us_topic_0171122845_uicontrol382850423191944"><b>Instance Management</b></span> page, locate the target DB instance and choose <span class="menucascade" id="gaussdb_03_0058__en-us_topic_0171122845_menucascade158784999010023"><b><span class="uicontrol" id="gaussdb_03_0058__uicontrol157226285710023">More</span></b> &gt; <b><span class="uicontrol" id="gaussdb_03_0058__uicontrol18071062810023">Create Backup</span></b></span> in the <strong id="gaussdb_03_0058__en-us_topic_0171122845_b84235270610314">Operation</strong> column.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122845_l6d35af1958874f2bb67501ccf04f2079"><span>In the displayed dialog box, enter a backup name and description. Then, click <strong id="gaussdb_03_0058__en-us_topic_0171122845_b1990655243114223">OK</strong>. If you want to cancel the backup creation task, click <strong id="gaussdb_03_0058__en-us_topic_0171122845_b118111817135615">Cancel</strong>.</span><p><ul id="gaussdb_03_0058__en-us_topic_0171122845_ul18955183374417"><li id="gaussdb_03_0058__en-us_topic_0171122845_li18955153311448">The backup name must consist of 4 to 64 characters and start with a letter. It can contain only uppercase letters, lowercase letters, digits, hyphens (-), and underscores (_).</li><li id="gaussdb_03_0058__en-us_topic_0171122845_li69551933104417">The description must consist of a maximum of 256 characters and cannot contain the carriage return character or the following special characters: !&lt;"='&gt;&amp;</li><li id="gaussdb_03_0058__en-us_topic_0171122845_li295518336442">The time required for creating a manual backup depends on the data volume of the DB instance.</li></ul>
</p></li><li id="gaussdb_03_0058__en-us_topic_0171122845_li9129133519114"><span>After a manual backup has been created, you can view and manage it on the <span class="uicontrol" id="gaussdb_03_0058__en-us_topic_0171122845_uicontrol27595146171816"><b>Backup Management</b></span> page.</span></li></ol>
<div class="section" id="gaussdb_03_0058__en-us_topic_0171122845_section3535102285710"><h4 class="sectiontitle">Method 1</h4><ol id="gaussdb_03_0058__en-us_topic_0171122845_o2173078bb42c41a0b711d64c49e2565d"><li id="gaussdb_03_0058__li1370755351020"><span>Log in to the management console.</span></li><li id="gaussdb_03_0058__li15708115351019"><span>Click <span><img id="gaussdb_03_0058__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0058__li27086537104"><span>Click <strong id="gaussdb_03_0058__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0058__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0058__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122845_l6b462da2019b41cd87b384de44f2bcc9"><span>On the <span class="uicontrol" id="gaussdb_03_0058__en-us_topic_0171122845_uicontrol382850423191944"><b>Instances</b></span> page, locate the target DB instance and choose <span class="menucascade" id="gaussdb_03_0058__en-us_topic_0171122845_menucascade158784999010023"><b><span class="uicontrol" id="gaussdb_03_0058__uicontrol157226285710023">More</span></b> &gt; <b><span class="uicontrol" id="gaussdb_03_0058__uicontrol18071062810023">Create Backup</span></b></span> in the <strong id="gaussdb_03_0058__en-us_topic_0171122845_b84235270610314">Operation</strong> column.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122845_l6d35af1958874f2bb67501ccf04f2079"><span>In the displayed dialog box, enter a backup name and description. Then, click <strong id="gaussdb_03_0058__en-us_topic_0171122845_b1990655243114223">OK</strong>. If you want to cancel the backup creation task, click <strong id="gaussdb_03_0058__en-us_topic_0171122845_b118111817135615">Cancel</strong>.</span><p><ul id="gaussdb_03_0058__en-us_topic_0171122845_ul18955183374417"><li id="gaussdb_03_0058__en-us_topic_0171122845_li18955153311448">The backup name must consist of 4 to 64 characters and start with a letter. It can contain only uppercase letters, lowercase letters, digits, hyphens (-), and underscores (_).</li><li id="gaussdb_03_0058__en-us_topic_0171122845_li69551933104417">The description must consist of a maximum of 256 characters and cannot contain the carriage return character or the following special characters: !&lt;"='&gt;&amp;</li><li id="gaussdb_03_0058__en-us_topic_0171122845_li295518336442">The time required for creating a manual backup depends on the data volume of the DB instance.</li></ul>
</p></li><li id="gaussdb_03_0058__en-us_topic_0171122845_li9129133519114"><span>After a manual backup has been created, you can view and manage it on the <span class="uicontrol" id="gaussdb_03_0058__en-us_topic_0171122845_uicontrol27595146171816"><b>Backups</b></span> page.</span></li></ol>
</div>
<div class="section" id="gaussdb_03_0058__en-us_topic_0171122845_section56713052173915"><h4 class="sectiontitle">Method 2</h4><ol id="gaussdb_03_0058__en-us_topic_0171122845_ol30354504173915"><li id="gaussdb_03_0058__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0058__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0058__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_03_0058__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_03_0058__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122845_li4755084173915"><span>On the <strong id="gaussdb_03_0058__b118550862015">Instance Management</strong> page, click the target DB instance.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122845_li66582655173915"><span>On the <strong id="gaussdb_03_0058__en-us_topic_0171122845_b842352706115220">Backups &amp; Restorations</strong> page, click <strong id="gaussdb_03_0058__en-us_topic_0171122845_b842352706115231">Create Backup</strong>. In the displayed dialog box, enter a backup name and a description, and click <strong id="gaussdb_03_0058__en-us_topic_0171122845_b1454363206114213">OK</strong>. If you want to cancel the backup creation task, click <strong id="gaussdb_03_0058__b117521952121416">Cancel</strong>.</span><p><ul id="gaussdb_03_0058__en-us_topic_0171122845_ul24021752174714"><li id="gaussdb_03_0058__gaussdb_03_0058_en-us_topic_0171122845_li18955153311448">The backup name must consist of 4 to 64 characters and start with a letter. It can contain only uppercase letters, lowercase letters, digits, hyphens (-), and underscores (_).</li><li id="gaussdb_03_0058__gaussdb_03_0058_en-us_topic_0171122845_li69551933104417">The description must consist of a maximum of 256 characters and cannot contain the carriage return character or the following special characters: !&lt;"='&gt;&amp;</li><li id="gaussdb_03_0058__gaussdb_03_0058_en-us_topic_0171122845_li295518336442">The time required for creating a manual backup depends on the data volume of the DB instance.</li></ul>
</p></li><li id="gaussdb_03_0058__en-us_topic_0171122845_li17482143281917"><span>After a manual backup has been created, you can view and manage it on the <span class="uicontrol" id="gaussdb_03_0058__uicontrol941140588"><b>Backup Management</b></span> page.</span></li></ol>
<div class="section" id="gaussdb_03_0058__en-us_topic_0171122845_section56713052173915"><h4 class="sectiontitle">Method 2</h4><ol id="gaussdb_03_0058__en-us_topic_0171122845_ol30354504173915"><li id="gaussdb_03_0058__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0058__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0058__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_03_0058__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_03_0058__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122845_li4755084173915"><span>On the <strong id="gaussdb_03_0058__b118550862015">Instances</strong> page, click the target DB instance.</span></li><li id="gaussdb_03_0058__en-us_topic_0171122845_li66582655173915"><span>On the <strong id="gaussdb_03_0058__en-us_topic_0171122845_b842352706115220">Backups</strong> page, click <strong id="gaussdb_03_0058__en-us_topic_0171122845_b842352706115231">Create Backup</strong>. In the displayed dialog box, enter a backup name and a description, and click <strong id="gaussdb_03_0058__en-us_topic_0171122845_b1454363206114213">OK</strong>. If you want to cancel the backup creation task, click <strong id="gaussdb_03_0058__b117521952121416">Cancel</strong>.</span><p><ul id="gaussdb_03_0058__en-us_topic_0171122845_ul24021752174714"><li id="gaussdb_03_0058__gaussdb_03_0058_en-us_topic_0171122845_li18955153311448">The backup name must consist of 4 to 64 characters and start with a letter. It can contain only uppercase letters, lowercase letters, digits, hyphens (-), and underscores (_).</li><li id="gaussdb_03_0058__gaussdb_03_0058_en-us_topic_0171122845_li69551933104417">The description must consist of a maximum of 256 characters and cannot contain the carriage return character or the following special characters: !&lt;"='&gt;&amp;</li><li id="gaussdb_03_0058__gaussdb_03_0058_en-us_topic_0171122845_li295518336442">The time required for creating a manual backup depends on the data volume of the DB instance.</li></ul>
</p></li><li id="gaussdb_03_0058__en-us_topic_0171122845_li17482143281917"><span>After a manual backup has been created, you can view and manage it on the <span class="uicontrol" id="gaussdb_03_0058__uicontrol1887584440"><b>Backups</b></span> page.</span></li></ol>
</div>
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<h1 class="topictitle1">Restoring Data from a Backup</h1>
<div id="body8662426"><div class="section" id="gaussdb_03_0063__en-us_topic_0171122730_section468581517207"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_03_0063__en-us_topic_0171122730_p21389033144317">You can use an automated or manual backup to restore data to the status when the backup was created. The restoration is at the DB instance level.</p>
</div>
<div class="section" id="gaussdb_03_0063__en-us_topic_0171122730_section56693485162629"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0063__en-us_topic_0171122730_o294a3f1667454757ae89c4cc2cb2f68c"><li id="gaussdb_03_0063__li11228025111113"><span>Log in to the management console.</span></li><li id="gaussdb_03_0063__li12228142581118"><span>Click <span><img id="gaussdb_03_0063__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0063__li1622802517117"><span>Click <strong id="gaussdb_03_0063__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0063__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0063__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0063__en-us_topic_0171122730_lb56703479c4d499aae19c0f66c05f580"><span>On the <strong id="gaussdb_03_0063__en-us_topic_0171122730_b842352706111028">Backup Management</strong> page, select the backup to be restored and click <strong id="gaussdb_03_0063__en-us_topic_0171122730_b84235270611119">Restore</strong> in the <strong id="gaussdb_03_0063__en-us_topic_0171122730_b842352706111114">Operation</strong> column.</span></li><li id="gaussdb_03_0063__en-us_topic_0171122730_l02b85d494b33478aa0354867be338dda"><span>Click <strong id="gaussdb_03_0063__b139608415373">OK</strong>. Currently, you can only restore data to a new DB instance.</span><p><p id="gaussdb_03_0063__p11243512165319">The <strong id="gaussdb_03_0063__en-us_topic_0171122730_b842352706151839">Create New Instance</strong> page is displayed.</p>
<div class="section" id="gaussdb_03_0063__en-us_topic_0171122730_section56693485162629"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0063__en-us_topic_0171122730_o294a3f1667454757ae89c4cc2cb2f68c"><li id="gaussdb_03_0063__li11228025111113"><span>Log in to the management console.</span></li><li id="gaussdb_03_0063__li12228142581118"><span>Click <span><img id="gaussdb_03_0063__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0063__li1622802517117"><span>Click <strong id="gaussdb_03_0063__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0063__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0063__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0063__en-us_topic_0171122730_lb56703479c4d499aae19c0f66c05f580"><span>On the <strong id="gaussdb_03_0063__en-us_topic_0171122730_b842352706111028">Backups</strong> page, select the backup to be restored and click <strong id="gaussdb_03_0063__en-us_topic_0171122730_b84235270611119">Restore</strong> in the <strong id="gaussdb_03_0063__en-us_topic_0171122730_b842352706111114">Operation</strong> column.</span></li><li id="gaussdb_03_0063__en-us_topic_0171122730_l02b85d494b33478aa0354867be338dda"><span>Click <strong id="gaussdb_03_0063__b139608415373">OK</strong>. Currently, you can only restore data to a new DB instance.</span><p><p id="gaussdb_03_0063__p11243512165319">The <strong id="gaussdb_03_0063__en-us_topic_0171122730_b842352706151839">Create New Instance</strong> page is displayed.</p>
<ul id="gaussdb_03_0063__ul13244111225319"><li id="gaussdb_03_0063__li12243171255313">The region, DB engine and version of the new DB instance are the same as those of the original DB instance and cannot be changed.</li><li id="gaussdb_03_0063__li15140195713428">The database port is <strong id="gaussdb_03_0063__b824350163518">3306</strong> by default.</li><li id="gaussdb_03_0063__li32449122537">Other settings are the same as those of the original DB instance by default and can be modified. For details, see <a href="gaussdb_02_0004.html">Step 1: Create a DB Instance</a>.</li></ul>
</p></li><li id="gaussdb_03_0063__en-us_topic_0171122730_li47261333165018"><span>View the restoration results.</span><p><p id="gaussdb_03_0063__p5201134913458">A new DB instance is created using the backup data. The instance status changes from <span class="uicontrol" id="gaussdb_03_0063__en-us_topic_0171122730_uicontrol1693564573152917"><b>Creating</b></span> to <span class="uicontrol" id="gaussdb_03_0063__en-us_topic_0171122730_uicontrol1763825462152917"><b>Available</b></span>.</p>
<p id="gaussdb_03_0063__en-us_topic_0171122730_p613729164812">The new DB instance is independent from the original one. If you want to offload read pressure on the primary node, create one or more read replicas for the new DB instance.</p>

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</div>
<div class="notice" id="gaussdb_03_0068__en-us_topic_0171122866_note66377071111037"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0068__en-us_topic_0171122866_p10249075175439">Deleted manual backups cannot be recovered. Exercise caution when performing this operation.</p>
</div></div>
<div class="section" id="gaussdb_03_0068__en-us_topic_0171122866_s84d6bef8cb664c9480d4c8fbec48744f"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0068__en-us_topic_0171122866_ode438610b1184490b63a9b763614d733"><li id="gaussdb_03_0068__li114342521119"><span>Log in to the management console.</span></li><li id="gaussdb_03_0068__li243425261113"><span>Click <span><img id="gaussdb_03_0068__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0068__li0435652111111"><span>Click <strong id="gaussdb_03_0068__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0068__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0068__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0068__en-us_topic_0171122866_li157018131014"><span>In the navigation pane on the left, choose <strong id="gaussdb_03_0068__en-us_topic_0171122866_b5344437192518">Backup Management</strong>. On the displayed page, locate the manual backup to be deleted and click <strong id="gaussdb_03_0068__en-us_topic_0171122866_b17344837152512">Delete</strong> in the <strong id="gaussdb_03_0068__en-us_topic_0171122866_b734563732513">Operation</strong> column.</span><p><p id="gaussdb_03_0068__en-us_topic_0171122866_p995916273016">The following backups cannot be deleted:</p>
<div class="section" id="gaussdb_03_0068__en-us_topic_0171122866_s84d6bef8cb664c9480d4c8fbec48744f"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0068__en-us_topic_0171122866_ode438610b1184490b63a9b763614d733"><li id="gaussdb_03_0068__li114342521119"><span>Log in to the management console.</span></li><li id="gaussdb_03_0068__li243425261113"><span>Click <span><img id="gaussdb_03_0068__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0068__li0435652111111"><span>Click <strong id="gaussdb_03_0068__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0068__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0068__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0068__en-us_topic_0171122866_li157018131014"><span>In the navigation pane on the left, choose <strong id="gaussdb_03_0068__en-us_topic_0171122866_b5344437192518">Backups</strong>. On the displayed page, locate the manual backup to be deleted and click <strong id="gaussdb_03_0068__en-us_topic_0171122866_b17344837152512">Delete</strong> in the <strong id="gaussdb_03_0068__en-us_topic_0171122866_b734563732513">Operation</strong> column.</span><p><p id="gaussdb_03_0068__en-us_topic_0171122866_p995916273016">The following backups cannot be deleted:</p>
<ul id="gaussdb_03_0068__en-us_topic_0171122866_ul10959152714016"><li id="gaussdb_03_0068__en-us_topic_0171122866_li1795916271809">Automated backups</li><li id="gaussdb_03_0068__en-us_topic_0171122866_li79593272004">Backups that are being restored</li></ul>
</p></li><li id="gaussdb_03_0068__en-us_topic_0171122866_en-us_topic_0023328311_li54551811344"><span>Click <span class="uicontrol" id="gaussdb_03_0068__en-us_topic_0171122866_uicontrol2309427771211"><b>Yes</b></span>.</span></li></ol>
</div>

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<p id="gaussdb_03_0072__p195151517170">When you have already created a parameter template and want to include most of the custom parameters and values from that template in a new parameter template, you can replicate that parameter template following the instructions provided in <a href="gaussdb_08_0014.html">Replicating a Parameter Template</a>.</p>
<p id="gaussdb_03_0072__p1495215191710">The following are the key points you should know when using parameters:</p>
<ul id="gaussdb_03_0072__ul795181501717"><li id="gaussdb_03_0072__li2463155814719">When you change a dynamic parameter value in a parameter template and save the change, the change takes effect immediately. When you change a static parameter value in a parameter template and save the change, the change will take effect only after you manually reboot the DB instances to which the parameter template applies.</li><li id="gaussdb_03_0072__li14956155171">Improper parameter settings may have unintended adverse effects, including degraded performance and system instability. Exercise caution when modifying database parameters and you need to back up data before modifying parameters in a parameter template. Before applying parameter template changes to a production DB instance, you should try out these changes on a test DB instance.</li></ul>
<div class="section" id="gaussdb_03_0072__s1d4b577d340b4a0baa353efbd0219c2d"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0072__oba817fec0e424e889d618c4a80c2b686"><li id="gaussdb_03_0072__li612172720122"><span>Log in to the management console.</span></li><li id="gaussdb_03_0072__li1712327181216"><span>Click <span><img id="gaussdb_03_0072__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0072__li712102751213"><span>Click <strong id="gaussdb_03_0072__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0072__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0072__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0072__ld614deee55ec43dd853e08591f57dc6b"><span>On the <span class="uicontrol" id="gaussdb_03_0072__uicontrol182311199020"><b>Parameter Template Management</b></span> page, click <span class="uicontrol" id="gaussdb_03_0072__uicontrol1323220191605"><b>Create Parameter Template</b></span>.</span></li><li id="gaussdb_03_0072__lc179a8ec923940d69f8b255392d22480"><span>In the displayed dialog box, configure required information and click <strong id="gaussdb_03_0072__b19945185113019">OK</strong>.</span><p><ul id="gaussdb_03_0072__u44451e1258344d23af4083dd22d99beb"><li id="gaussdb_03_0072__l054d879e10224dda9a59b1c5b1777d73">Select a DB engine for the parameter template.</li><li id="gaussdb_03_0072__l5b0b55c0be574a30b2971df004f0dac7">The template name must consist of 1 to 64 characters. It can contain only uppercase letters, lowercase letters, digits, hyphens (-), underscores (_), and periods (.).</li><li id="gaussdb_03_0072__l17da2c371ddf4f77aa1f4e59f5153e39">The description consists of a maximum of 256 characters and cannot contain the carriage return character or the following special characters: &gt;!&lt;"&amp;'=</li></ul>
<div class="section" id="gaussdb_03_0072__s1d4b577d340b4a0baa353efbd0219c2d"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0072__oba817fec0e424e889d618c4a80c2b686"><li id="gaussdb_03_0072__li612172720122"><span>Log in to the management console.</span></li><li id="gaussdb_03_0072__li1712327181216"><span>Click <span><img id="gaussdb_03_0072__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0072__li712102751213"><span>Click <strong id="gaussdb_03_0072__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0072__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0072__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0072__ld614deee55ec43dd853e08591f57dc6b"><span>On the <span class="uicontrol" id="gaussdb_03_0072__uicontrol182311199020"><b>Parameter Templates</b></span> page, click <span class="uicontrol" id="gaussdb_03_0072__uicontrol1323220191605"><b>Create Parameter Template</b></span>.</span></li><li id="gaussdb_03_0072__lc179a8ec923940d69f8b255392d22480"><span>In the displayed dialog box, configure required information and click <strong id="gaussdb_03_0072__b19945185113019">OK</strong>.</span><p><ul id="gaussdb_03_0072__u44451e1258344d23af4083dd22d99beb"><li id="gaussdb_03_0072__l054d879e10224dda9a59b1c5b1777d73">Select a DB engine for the parameter template.</li><li id="gaussdb_03_0072__l5b0b55c0be574a30b2971df004f0dac7">The template name must consist of 1 to 64 characters. It can contain only uppercase letters, lowercase letters, digits, hyphens (-), underscores (_), and periods (.).</li><li id="gaussdb_03_0072__l17da2c371ddf4f77aa1f4e59f5153e39">The description consists of a maximum of 256 characters and cannot contain the carriage return character or the following special characters: &gt;!&lt;"&amp;'=</li></ul>
</p></li></ol>
</div>
</div>

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<ul id="gaussdb_03_0088__en-us_topic_0171122573_ul732244011344"><li id="gaussdb_03_0088__en-us_topic_0171122573_li6590196511344">The DB instance keeps running properly for about 10 minutes.<p id="gaussdb_03_0088__en-us_topic_0171122573_p5624677711344"><a name="gaussdb_03_0088__en-us_topic_0171122573_li6590196511344"></a><a name="en-us_topic_0171122573_li6590196511344"></a>For a newly created DB instance, you need to wait for a while before viewing the monitoring metrics.</p>
</li></ul>
</div>
<div class="section" id="gaussdb_03_0088__en-us_topic_0171122573_section3645894911344"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0088__en-us_topic_0171122394_ofed1a8ddecfe4f30ae4ee41b592d8860"><li id="gaussdb_03_0088__li1254514419124"><span>Log in to the management console.</span></li><li id="gaussdb_03_0088__li1754513415129"><span>Click <span><img id="gaussdb_03_0088__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0088__li1754514414125"><span>Click <strong id="gaussdb_03_0088__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0088__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0088__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0088__en-us_topic_0171122394_li733322918505"><span>On the <strong id="gaussdb_03_0088__b09337278358">Instance Management</strong> page, locate the target DB instance and click <strong id="gaussdb_03_0088__b179341027103518">View Metric</strong> in the <strong id="gaussdb_03_0088__b1693472763519">Operation</strong> column to go to the Cloud Eye console.</span><p><p id="gaussdb_03_0088__p619712216312">You can use either of the following methods to view monitoring metrics:</p>
<div class="section" id="gaussdb_03_0088__en-us_topic_0171122573_section3645894911344"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0088__en-us_topic_0171122394_ofed1a8ddecfe4f30ae4ee41b592d8860"><li id="gaussdb_03_0088__li1254514419124"><span>Log in to the management console.</span></li><li id="gaussdb_03_0088__li1754513415129"><span>Click <span><img id="gaussdb_03_0088__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0088__li1754514414125"><span>Click <strong id="gaussdb_03_0088__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0088__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0088__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0088__en-us_topic_0171122394_li733322918505"><span>On the <strong id="gaussdb_03_0088__b09337278358">Instances</strong> page, locate the target DB instance and click <strong id="gaussdb_03_0088__b179341027103518">View Metric</strong> in the <strong id="gaussdb_03_0088__b1693472763519">Operation</strong> column to go to the Cloud Eye console.</span><p><p id="gaussdb_03_0088__p619712216312">You can use either of the following methods to view monitoring metrics:</p>
<ul id="gaussdb_03_0088__ul173684419317"><li id="gaussdb_03_0088__li372371018311">Click the target DB instance. On the displayed <strong id="gaussdb_03_0088__b11862203111352">Basic Information</strong> page, click <strong id="gaussdb_03_0088__b13863153119351">View Metric</strong> in the upper right corner of the page to go to the Cloud Eye console.</li><li id="gaussdb_03_0088__li1336815412314">At the bottom part of the <strong id="gaussdb_03_0088__b62819333354">Basic Information</strong> page, locate the target read replica and click <strong id="gaussdb_03_0088__b228213323519">View Metric</strong> in the <strong id="gaussdb_03_0088__b1728213313518">Operation</strong> column to go to the Cloud Eye console.</li></ul>
</p></li><li id="gaussdb_03_0088__li3884818457"><span>On the Cloud Eye console, view DB instance monitoring metrics. </span><p><p id="gaussdb_03_0088__p485391054514">Cloud Eye can monitor performance metrics from the last 1 hour, last 3 hours, last 12 hours, last 24 hours or last 7 days.</p>
</p></li></ol>

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<div class="notice" id="gaussdb_03_0092__note1872613734311"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><ul id="gaussdb_03_0092__ul19406164854319"><li id="gaussdb_03_0092__li5407184824319">Changing the CPU and memory specifications will cause the instance to reboot. To prevent service interruptions, change the instance specifications during off-peak hours.</li><li id="gaussdb_03_0092__li1843555011437">To prevent traffic congestion during peak hours, you are advised to reboot the DB instance during off-peak hours.</li></ul>
</div></div>
</div>
<div class="section" id="gaussdb_03_0092__en-us_topic_0192953906_section4298797218435"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0092__en-us_topic_0192953906_ol5947368818435"><li id="gaussdb_03_0092__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0092__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0092__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0092__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0092__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0092__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0092__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0092__li94335118165"><span>You can change the instance specifications in either of the following ways:</span><p><ul id="gaussdb_03_0092__ul793313811161"><li id="gaussdb_03_0092__li109335813160">On the <span class="uicontrol" id="gaussdb_03_0092__en-us_topic_0192953906_uicontrol1223145619914"><b>Instance Management</b></span> page, locate the target DB instance and choose <span class="uicontrol" id="gaussdb_03_0092__en-us_topic_0192953906_uicontrol42324561915"><b>More</b></span> &gt; <span class="uicontrol" id="gaussdb_03_0092__en-us_topic_0192953906_uicontrol9233155612917"><b>Change Instance Specifications</b></span> in the <span class="uicontrol" id="gaussdb_03_0092__en-us_topic_0192953906_uicontrol192351956397"><b>Operation</b></span> column.</li><li id="gaussdb_03_0092__li5454151131618">Click the target DB instance to go to the <strong id="gaussdb_03_0092__b9890114922913">Basic Information</strong> page. In the <strong id="gaussdb_03_0092__b166552057122914">DB Instance Information</strong> area, click <strong id="gaussdb_03_0092__b17702182153014">Change</strong> in the <strong id="gaussdb_03_0092__b13398929173011">Instance Specifications</strong> field.</li></ul>
<div class="section" id="gaussdb_03_0092__en-us_topic_0192953906_section4298797218435"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0092__en-us_topic_0192953906_ol5947368818435"><li id="gaussdb_03_0092__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0092__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0092__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0092__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0092__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0092__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0092__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0092__li94335118165"><span>You can change the instance specifications in either of the following ways:</span><p><ul id="gaussdb_03_0092__ul793313811161"><li id="gaussdb_03_0092__li109335813160">On the <span class="uicontrol" id="gaussdb_03_0092__en-us_topic_0192953906_uicontrol1223145619914"><b>Instances</b></span> page, locate the target DB instance and choose <span class="uicontrol" id="gaussdb_03_0092__en-us_topic_0192953906_uicontrol42324561915"><b>More</b></span> &gt; <span class="uicontrol" id="gaussdb_03_0092__en-us_topic_0192953906_uicontrol9233155612917"><b>Change Instance Specifications</b></span> in the <span class="uicontrol" id="gaussdb_03_0092__en-us_topic_0192953906_uicontrol192351956397"><b>Operation</b></span> column.</li><li id="gaussdb_03_0092__li5454151131618">Click the target DB instance to go to the <strong id="gaussdb_03_0092__b9890114922913">Basic Information</strong> page. In the <strong id="gaussdb_03_0092__b166552057122914">DB Instance Information</strong> area, click <strong id="gaussdb_03_0092__b17702182153014">Change</strong> in the <strong id="gaussdb_03_0092__b13398929173011">Instance Specifications</strong> field.</li></ul>
</p></li><li id="gaussdb_03_0092__en-us_topic_0192953906_lf939df2e325d47d490c6ffdacf5f0b19"><span>On the displayed page, specify the new instance specifications, and click <strong id="gaussdb_03_0092__b868737105110">Next</strong>.</span></li><li id="gaussdb_03_0092__li6351398154947"><span>On the displayed page, confirm the instance specifications.</span><p><ul id="gaussdb_03_0092__ul39403645154947"><li id="gaussdb_03_0092__li19088491154947">If you need to modify your settings, click <strong id="gaussdb_03_0092__b1212144125112">Previous</strong> to go back to the page where you specify details.</li><li id="gaussdb_03_0092__li50208416144741">If you do not need to modify your settings, click <strong id="gaussdb_03_0092__b11500175219516">Submit</strong>.</li></ul>
</p></li><li id="gaussdb_03_0092__en-us_topic_0192953906_li984592715347"><span>View the DB instance specification change result.</span><p><p id="gaussdb_03_0092__p9528195254714">Changing the instance specifications takes 5–15 minutes. During this period, the status of the instance on the <strong id="gaussdb_03_0092__b1510674811">Instance Management</strong> page is <strong id="gaussdb_03_0092__b55114719810">Changing instance specifications</strong>. After a few minutes, you can click the instance name to view the new instance specifications on the displayed <span class="uicontrol" id="gaussdb_03_0092__uicontrol125111876813"><b>Basic Information</b></span> page.</p>
</p></li><li id="gaussdb_03_0092__en-us_topic_0192953906_li984592715347"><span>View the DB instance specification change result.</span><p><p id="gaussdb_03_0092__p9528195254714">Changing the instance specifications takes 5–15 minutes. During this period, the status of the instance on the <strong id="gaussdb_03_0092__b1510674811">Instances</strong> page is <strong id="gaussdb_03_0092__b55114719810">Changing instance specifications</strong>. After a few minutes, you can click the instance name to view the new instance specifications on the displayed <span class="uicontrol" id="gaussdb_03_0092__uicontrol125111876813"><b>Basic Information</b></span> page.</p>
<div class="notice" id="gaussdb_03_0092__en-us_topic_0192953906_note11544369163244"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0092__p2058413141616">After the specifications of DB instances 8.0 are changed, the system will change the values of the following parameters accordingly: <span class="parmname" id="gaussdb_03_0092__parmname658613161612"><b>innodb_buffer_pool_size</b></span>, <span class="parmname" id="gaussdb_03_0092__parmname55814134163"><b>innodb_log_buffer_size</b></span>, <span class="parmname" id="gaussdb_03_0092__parmname1158191391617"><b>max_connections</b></span>, <span class="parmname" id="gaussdb_03_0092__en-us_topic_0192953906_parmname242841101702"><b>innodb_buffer_pool_instances</b></span>, <span class="parmname" id="gaussdb_03_0092__parmname16420102361811"><b>innodb_page_cleaners</b></span>, <span class="parmname" id="gaussdb_03_0092__parmname48637308184"><b>innodb_parallel_read_threads</b></span>, <span class="parmname" id="gaussdb_03_0092__parmname284703631820"><b>innodb_read_io_threads</b></span>, <span class="parmname" id="gaussdb_03_0092__parmname2224154220185"><b>innodb_write_io_threads</b></span>, <span class="parmname" id="gaussdb_03_0092__parmname186201646131820"><b>threadpool_size</b></span> and <span class="parmname" id="gaussdb_03_0092__en-us_topic_0192953906_parmname3195339417017"><b>query_cache_size</b></span>.</p>
</div></div>
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<p id="gaussdb_03_0111__en-us_topic_0192954053_ab425f8e7964943a8872515e735a80847">After a DB instance is created, you can <span class="keyword" id="gaussdb_03_0111__en-us_topic_0192954053_keyword1429162818452">create read replicas</span> for it.</p>
<ul id="gaussdb_03_0111__ul12773183744620"><li id="gaussdb_03_0111__li1060820521367">If you select the single AZ type, read replicas are deployed in the same AZ as the primary node.</li><li id="gaussdb_03_0111__li1377313376468">If you select the multi-AZ type, read replicas are deployed in different AZs from the primary node to ensure high reliability.</li></ul>
<div class="section" id="gaussdb_03_0111__en-us_topic_0192954053_s738501c07aa4426eaeea764d9297251d"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0111__en-us_topic_0192954053_o4ea77a7629f0406da65203f5b2a24303"><li id="gaussdb_03_0111__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0111__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0111__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0111__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0111__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0111__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0111__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0111__en-us_topic_0192954053_lecad2be0d83a413d8227da27c228a13c"><span>On the <span class="uicontrol" id="gaussdb_03_0111__en-us_topic_0192954053_u2f77692195e54523869bd8ec29f0cf54"><b>Instance Management</b></span> page, locate the target DB instance and choose <strong id="gaussdb_03_0111__b747514710278">More</strong> &gt; <strong id="gaussdb_03_0111__b7501550152714">Create Read Replica</strong> in the <span class="uicontrol" id="gaussdb_03_0111__en-us_topic_0192954053_u455fb94d5ad14353846b6e38709add27"><b>Operation</b></span> column.</span><p><p id="gaussdb_03_0111__en-us_topic_0192954053_p158414571257">Alternatively, click the target DB instance. In the <strong id="gaussdb_03_0111__b5751412194813">DB Instance Topology</strong> area on the <span class="uicontrol" id="gaussdb_03_0111__en-us_topic_0192954053_uicontrol061294717610"><b>Basic Information</b></span> page, click <span><img id="gaussdb_03_0111__en-us_topic_0192954053_image1426465281914" src="en-us_image_0000001403218753.png"></span> to create read replicas.</p>
<div class="section" id="gaussdb_03_0111__en-us_topic_0192954053_s738501c07aa4426eaeea764d9297251d"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_03_0111__en-us_topic_0192954053_o4ea77a7629f0406da65203f5b2a24303"><li id="gaussdb_03_0111__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0111__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0111__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0111__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0111__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0111__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0111__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0111__en-us_topic_0192954053_lecad2be0d83a413d8227da27c228a13c"><span>On the <span class="uicontrol" id="gaussdb_03_0111__en-us_topic_0192954053_u2f77692195e54523869bd8ec29f0cf54"><b>Instances</b></span> page, locate the target DB instance and choose <strong id="gaussdb_03_0111__b747514710278">More</strong> &gt; <strong id="gaussdb_03_0111__b7501550152714">Create Read Replica</strong> in the <span class="uicontrol" id="gaussdb_03_0111__en-us_topic_0192954053_u455fb94d5ad14353846b6e38709add27"><b>Operation</b></span> column.</span><p><p id="gaussdb_03_0111__en-us_topic_0192954053_p158414571257">Alternatively, click the target DB instance. In the <strong id="gaussdb_03_0111__b5751412194813">DB Instance Topology</strong> area on the <span class="uicontrol" id="gaussdb_03_0111__en-us_topic_0192954053_uicontrol061294717610"><b>Basic Information</b></span> page, click <span><img id="gaussdb_03_0111__en-us_topic_0192954053_image1426465281914" src="en-us_image_0000001403218753.png"></span> to create read replicas.</p>
</p></li><li id="gaussdb_03_0111__en-us_topic_0192954053_ldbf12a91659a4dc09477278d640012ab"><span>On the displayed page, specify <span class="uicontrol" id="gaussdb_03_0111__uicontrol155139593620"><b>Failover Priority</b></span> and <span class="uicontrol" id="gaussdb_03_0111__uicontrol8513195163614"><b>Quantity</b></span> and then click <span class="uicontrol" id="gaussdb_03_0111__uicontrol45131551366"><b>Create Now</b></span>.</span></li><li id="gaussdb_03_0111__en-us_topic_0192954053_li22028104294"><span>After read replicas are created, you can manage them following the instructions provided in <a href="gaussdb_03_0112.html">Managing a Read Replica</a>.</span></li></ol>
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<h1 class="topictitle1">Promoting a Read Replica to the Primary Node</h1>
<div id="body1582199944975"><p id="gaussdb_03_0113__p012221712212">A <span id="gaussdb_03_0113__text13188146859">GaussDB(for MySQL)</span> DB instance consists of a primary node and multiple read replicas. In addition to <a href="#gaussdb_03_0113__section1762033653214">automatic failover</a> scenarios, you can perform a <a href="#gaussdb_03_0113__section133052410322">manual switchover</a> to promote a read replica to the new primary node.</p>
<div class="section" id="gaussdb_03_0113__section133052410322"><a name="gaussdb_03_0113__section133052410322"></a><a name="section133052410322"></a><h4 class="sectiontitle">Manual Switchover</h4><ol id="gaussdb_03_0113__en-us_topic_0179844062_en-us_topic_0171122319_ol49836179475"><li id="gaussdb_03_0113__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0113__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0113__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0113__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0113__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0113__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0113__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0113__en-us_topic_0179844062_en-us_topic_0171122319_li124061901846"><span>On the <strong id="gaussdb_03_0113__b128394303249">Instance Management</strong> page, click the target DB instance.</span></li><li id="gaussdb_03_0113__en-us_topic_0179844062_en-us_topic_0171122319_li9984171764715"><span>At the bottom of the <strong id="gaussdb_03_0113__b915053815243">Basic Information</strong> page, locate the read replica to be promoted and click <strong id="gaussdb_03_0113__b18151163812248">Promote to Primary</strong> in the <strong id="gaussdb_03_0113__b615293872416">Operation</strong> column.</span></li><li id="gaussdb_03_0113__li1434433495816"><span>In the displayed dialog box, click <span class="uicontrol" id="gaussdb_03_0113__uicontrol747613501010"><b>Yes</b></span>.</span><p><ul id="gaussdb_03_0113__ul14468352205817"><li id="gaussdb_03_0113__li92918381363">During the manual switchover, an intermittent disconnection may occur for about 30 seconds. Ensure that your applications support automatic reconnection.</li><li id="gaussdb_03_0113__li146815213583">During the manual switchover, the instance status is <strong id="gaussdb_03_0113__b292610612298">Promoting to primary</strong> and this process takes several seconds or minutes.</li><li id="gaussdb_03_0113__li1021805455815">After the switchover is complete, the node running status changes to <strong id="gaussdb_03_0113__b15726292159">Available</strong>. The node types of the original primary node and read replica have been exchanged.<div class="notice" id="gaussdb_03_0113__note1626521503818"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0113__p1026581510383">Services may be intermittently interrupted for several seconds or minutes when the read replica is promoted to the primary node.</p>
<div class="section" id="gaussdb_03_0113__section133052410322"><a name="gaussdb_03_0113__section133052410322"></a><a name="section133052410322"></a><h4 class="sectiontitle">Manual Switchover</h4><ol id="gaussdb_03_0113__en-us_topic_0179844062_en-us_topic_0171122319_ol49836179475"><li id="gaussdb_03_0113__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0113__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0113__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0113__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0113__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0113__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0113__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0113__en-us_topic_0179844062_en-us_topic_0171122319_li124061901846"><span>On the <strong id="gaussdb_03_0113__b128394303249">Instances</strong> page, click the target DB instance.</span></li><li id="gaussdb_03_0113__en-us_topic_0179844062_en-us_topic_0171122319_li9984171764715"><span>At the bottom of the <strong id="gaussdb_03_0113__b915053815243">Basic Information</strong> page, locate the read replica to be promoted and click <strong id="gaussdb_03_0113__b18151163812248">Promote to Primary</strong> in the <strong id="gaussdb_03_0113__b615293872416">Operation</strong> column.</span></li><li id="gaussdb_03_0113__li1434433495816"><span>In the displayed dialog box, click <span class="uicontrol" id="gaussdb_03_0113__uicontrol747613501010"><b>Yes</b></span>.</span><p><ul id="gaussdb_03_0113__ul14468352205817"><li id="gaussdb_03_0113__li92918381363">During the manual switchover, an intermittent disconnection may occur for about 30 seconds. Ensure that your applications support automatic reconnection.</li><li id="gaussdb_03_0113__li146815213583">During the manual switchover, the instance status is <strong id="gaussdb_03_0113__b292610612298">Promoting to primary</strong> and this process takes several seconds or minutes.</li><li id="gaussdb_03_0113__li1021805455815">After the switchover is complete, the node running status changes to <strong id="gaussdb_03_0113__b15726292159">Available</strong>. The node types of the original primary node and read replica have been exchanged.<div class="notice" id="gaussdb_03_0113__note1626521503818"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0113__p1026581510383">Services may be intermittently interrupted for several seconds or minutes when the read replica is promoted to the primary node.</p>
</div></div>
</li></ul>
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<a name="gaussdb_03_0114"></a><a name="gaussdb_03_0114"></a>
<h1 class="topictitle1">Deleting a Read Replica</h1>
<div id="body1582199174649"><div class="section" id="gaussdb_03_0114__en-us_topic_0171122319_section50920834194327"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_03_0114__p1979135418384">You can manually delete read replicas on the <strong id="gaussdb_03_0114__b7409144315920">Instance Management</strong> page.</p>
<div id="body1582199174649"><div class="section" id="gaussdb_03_0114__en-us_topic_0171122319_section50920834194327"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_03_0114__p1979135418384">You can manually delete read replicas on the <strong id="gaussdb_03_0114__b7409144315920">Instances</strong> page.</p>
<div class="notice" id="gaussdb_03_0114__en-us_topic_0171122319_note291218261084"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_03_0114__p8326123915520">Deleted read replicas cannot be restored. Exercise caution when performing this operation.</p>
</div></div>
</div>
<div class="section" id="gaussdb_03_0114__section1350335144812"><h4 class="sectiontitle">Constraints</h4><ul id="gaussdb_03_0114__en-us_topic_0171122319_ul1098915407426"><li id="gaussdb_03_0114__li1952215513571">You can delete read replicas only when the DB instance has two or more than two read replicas. A GaussDB(for MySQL) DB instance must have at least one read replica.</li><li id="gaussdb_03_0114__en-us_topic_0171122319_li18506142104210">DB instances cannot be deleted when operations are being performed on them. They can be deleted only after the operations are completed.</li></ul>
</div>
<div class="section" id="gaussdb_03_0114__section1779714480488"><h4 class="sectiontitle"><span class="keyword" id="gaussdb_03_0114__keyword92714523187">Procedure</span></h4><ol id="gaussdb_03_0114__en-us_topic_0179844062_en-us_topic_0171122319_ol49836179475"><li id="gaussdb_03_0114__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0114__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0114__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0114__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0114__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0114__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0114__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0114__en-us_topic_0179844062_en-us_topic_0171122319_li124061901846"><span>On the <strong id="gaussdb_03_0114__b8818195124716">Instance Management</strong> page, click the target DB instance.</span></li><li id="gaussdb_03_0114__en-us_topic_0179844062_en-us_topic_0171122319_li9984171764715"><span>At the bottom of the <strong id="gaussdb_03_0114__b97193814473">Basic Information</strong> page, locate the read replicas to be deleted and choose <strong id="gaussdb_03_0114__b930144255414">More</strong> &gt; <strong id="gaussdb_03_0114__b771914818474">Delete</strong> in the <strong id="gaussdb_03_0114__b572078184714">Operation</strong> column. </span><p><p id="gaussdb_03_0114__en-us_topic_0179844062_p1243671818146">For high availability reasons, the system reserves an available read replica. The read replica cannot be deleted until the associated DB instance is deleted.</p>
</p></li><li id="gaussdb_03_0114__en-us_topic_0179844062_en-us_topic_0171122319_li398541724715"><span>In the displayed dialog box, click <span class="parmname" id="gaussdb_03_0114__parmname184461607482"><b>Yes</b></span>. Refresh the <strong id="gaussdb_03_0114__b1445119024818">Instance Management</strong> page later to check that the deletion is successful.</span></li></ol>
<div class="section" id="gaussdb_03_0114__section1779714480488"><h4 class="sectiontitle"><span class="keyword" id="gaussdb_03_0114__keyword92714523187">Procedure</span></h4><ol id="gaussdb_03_0114__en-us_topic_0179844062_en-us_topic_0171122319_ol49836179475"><li id="gaussdb_03_0114__en-us_topic_0171122646_lbbb80ba312054cfca3a8b1e4c3d016fa"><span>Log in to the management console.</span></li><li id="gaussdb_03_0114__en-us_topic_0171122646_l541898ae0beb476b8d4ba4e68723bbe9"><span>Click <span><img id="gaussdb_03_0114__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_03_0114__en-us_topic_0171122646_li16913104111"><span>Click <strong id="gaussdb_03_0114__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_03_0114__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_03_0114__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_03_0114__en-us_topic_0179844062_en-us_topic_0171122319_li124061901846"><span>On the <strong id="gaussdb_03_0114__b8818195124716">Instances</strong> page, click the target DB instance.</span></li><li id="gaussdb_03_0114__en-us_topic_0179844062_en-us_topic_0171122319_li9984171764715"><span>At the bottom of the <strong id="gaussdb_03_0114__b97193814473">Basic Information</strong> page, locate the read replicas to be deleted and choose <strong id="gaussdb_03_0114__b930144255414">More</strong> &gt; <strong id="gaussdb_03_0114__b771914818474">Delete</strong> in the <strong id="gaussdb_03_0114__b572078184714">Operation</strong> column. </span><p><p id="gaussdb_03_0114__en-us_topic_0179844062_p1243671818146">For high availability reasons, the system reserves an available read replica. The read replica cannot be deleted until the associated DB instance is deleted.</p>
</p></li><li id="gaussdb_03_0114__en-us_topic_0179844062_en-us_topic_0171122319_li398541724715"><span>In the displayed dialog box, click <span class="parmname" id="gaussdb_03_0114__parmname184461607482"><b>Yes</b></span>. Refresh the <strong id="gaussdb_03_0114__b1445119024818">Instances</strong> page later to check that the deletion is successful.</span></li></ol>
</div>
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<div id="body1597738429887"><div class="section" id="gaussdb_05_0018__section732387614651"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_05_0018__p1638354818120">Modifications to parameters in a custom parameter template take effect only after you apply this parameter template to target DB instances.</p>
<ul id="gaussdb_05_0018__ul6741843151716"><li id="gaussdb_05_0018__li12955114712175">The parameter <span class="parmname" id="gaussdb_05_0018__en-us_topic_0204854012_en-us_topic_0192953619_parmname38315386194"><b>innodb_buffer_pool_size</b></span> is determined by the memory. DB instances of different specifications have different value ranges. If this parameter value is out of range of the DB instance to which the parameter template applies, the maximum value within the range is used.</li><li id="gaussdb_05_0018__li11741343161710">A parameter template can be applied only to DB instances of the same DB engine version.</li></ul>
</div>
<div class="section" id="gaussdb_05_0018__section05781558132917"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_05_0018__o695f2c1c7b614765a3d9eb5e257b0bbd"><li id="gaussdb_05_0018__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_05_0018__li1742020376503"><span>Click <span><img id="gaussdb_05_0018__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_05_0018__li1142083714506"><span>Click <strong id="gaussdb_05_0018__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_05_0018__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_05_0018__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_05_0018__li7437257810"><span>On the <strong id="gaussdb_05_0018__b376717150280">Parameter Template Management</strong> page, you can apply a default template or a custom template to a target DB instance:</span><p><ul id="gaussdb_05_0018__ul517212618815"><li id="gaussdb_05_0018__li1617220268811">To apply a default template, click <strong id="gaussdb_05_0018__b3410142519281">Default Templates</strong>, locate the target parameter template, and in the <strong id="gaussdb_05_0018__b1141132511282">Operation</strong> column, click <strong id="gaussdb_05_0018__b0411825182817">Apply</strong>.</li><li id="gaussdb_05_0018__li15759194611512">To apply a custom template, click <strong id="gaussdb_05_0018__b7743133392814">Custom Templates</strong>, locate the target parameter template, and in the <strong id="gaussdb_05_0018__b157441833162815">Operation</strong> column, choose <strong id="gaussdb_05_0018__b19745193332819">More</strong> &gt; <strong id="gaussdb_05_0018__b15746633192815">Apply</strong>.</li></ul>
<div class="section" id="gaussdb_05_0018__section05781558132917"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_05_0018__o695f2c1c7b614765a3d9eb5e257b0bbd"><li id="gaussdb_05_0018__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_05_0018__li1742020376503"><span>Click <span><img id="gaussdb_05_0018__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_05_0018__li1142083714506"><span>Click <strong id="gaussdb_05_0018__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_05_0018__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_05_0018__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_05_0018__li7437257810"><span>On the <strong id="gaussdb_05_0018__b376717150280">Parameter Templates</strong> page, you can apply a default template or a custom template to a target DB instance:</span><p><ul id="gaussdb_05_0018__ul517212618815"><li id="gaussdb_05_0018__li1617220268811">To apply a default template, click <strong id="gaussdb_05_0018__b3410142519281">Default Templates</strong>, locate the target parameter template, and in the <strong id="gaussdb_05_0018__b1141132511282">Operation</strong> column, click <strong id="gaussdb_05_0018__b0411825182817">Apply</strong>.</li><li id="gaussdb_05_0018__li15759194611512">To apply a custom template, click <strong id="gaussdb_05_0018__b7743133392814">Custom Templates</strong>, locate the target parameter template, and in the <strong id="gaussdb_05_0018__b157441833162815">Operation</strong> column, choose <strong id="gaussdb_05_0018__b19745193332819">More</strong> &gt; <strong id="gaussdb_05_0018__b15746633192815">Apply</strong>.</li></ul>
<p id="gaussdb_05_0018__p3571105014158">A parameter template can be applied to one or more DB instances.</p>
</p></li><li id="gaussdb_05_0018__li18706155616397"><span>In the displayed dialog box, select one or more DB instances to which the parameter template will apply and click <strong id="gaussdb_05_0018__b1266713514332">OK</strong>.</span><p><p id="gaussdb_05_0018__p316713683017">After the parameter template applies to DB instances successfully, you can view the application records by referring to <a href="gaussdb_05_0098.html">Viewing Application Records of a Parameter Template</a>.</p>
</p></li></ol>

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<h1 class="topictitle1">Viewing Application Records of a Parameter Template</h1>
<div id="body1597738430380"><div class="section" id="gaussdb_05_0098__section732387614651"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_05_0098__p1638354818120">You can view the application records of a parameter template.</p>
</div>
<div class="section" id="gaussdb_05_0098__section05781558132917"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_05_0098__o695f2c1c7b614765a3d9eb5e257b0bbd"><li id="gaussdb_05_0098__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_05_0098__li1742020376503"><span>Click <span><img id="gaussdb_05_0098__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_05_0098__li1142083714506"><span>Click <strong id="gaussdb_05_0098__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_05_0098__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_05_0098__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_05_0098__li682712211199"><span>Choose <strong id="gaussdb_05_0098__b17105113184417">Parameter Template Management</strong> in the navigation pane on the left, locate the target parameter template, and click <strong id="gaussdb_05_0098__b19399152613814">View Application Record</strong> in the <strong id="gaussdb_05_0098__b1744162173911">Operation</strong> column on the <strong id="gaussdb_05_0098__b11183124218399">Default Templates</strong> page or choose <strong id="gaussdb_05_0098__b947071717433">More</strong> &gt; <strong id="gaussdb_05_0098__b1339605412387">View Application Record</strong> on the <strong id="gaussdb_05_0098__b1139835416388">Custom Templates</strong> page.</span><p><p id="gaussdb_05_0098__p2934173415294">You can view the name or ID of the DB instance to which the parameter template applies, as well as the application status, application time, and failure cause.</p>
<div class="section" id="gaussdb_05_0098__section05781558132917"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_05_0098__o695f2c1c7b614765a3d9eb5e257b0bbd"><li id="gaussdb_05_0098__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_05_0098__li1742020376503"><span>Click <span><img id="gaussdb_05_0098__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_05_0098__li1142083714506"><span>Click <strong id="gaussdb_05_0098__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_05_0098__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_05_0098__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_05_0098__li682712211199"><span>Choose <strong id="gaussdb_05_0098__b17105113184417">Parameter Templates</strong> in the navigation pane on the left, locate the target parameter template, and click <strong id="gaussdb_05_0098__b19399152613814">View Application Record</strong> in the <strong id="gaussdb_05_0098__b1744162173911">Operation</strong> column on the <strong id="gaussdb_05_0098__b11183124218399">Default Templates</strong> page or choose <strong id="gaussdb_05_0098__b947071717433">More</strong> &gt; <strong id="gaussdb_05_0098__b1339605412387">View Application Record</strong> on the <strong id="gaussdb_05_0098__b1139835416388">Custom Templates</strong> page.</span><p><p id="gaussdb_05_0098__p2934173415294">You can view the name or ID of the DB instance to which the parameter template applies, as well as the application status, application time, and failure cause.</p>
</p></li></ol>
</div>
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<div class="note" id="gaussdb_05_0099__note16916827192910"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="gaussdb_05_0099__p1068520591275">In a newly exported or created parameter template, the change history is blank.</p>
</div></div>
</div>
<div class="section" id="gaussdb_05_0099__section19506644183319"><h4 class="sectiontitle">Viewing Change History of DB Instance Parameters</h4><ol id="gaussdb_05_0099__ol12467113908"><li id="gaussdb_05_0099__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_05_0099__li1742020376503"><span>Click <span><img id="gaussdb_05_0099__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_05_0099__li1142083714506"><span>Click <strong id="gaussdb_05_0099__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_05_0099__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_05_0099__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_05_0099__li1487214221809"><span>On the <strong id="gaussdb_05_0099__en-us_topic_0171122799_b5318143754">Instance Management</strong> page, click the target DB instance.</span></li><li id="gaussdb_05_0099__li197471512474"><span>In the navigation pane on the left, choose <strong id="gaussdb_05_0099__en-us_topic_0204854009_en-us_topic_0192954047_b556014720597">Parameters</strong>. On the displayed page, click <strong id="gaussdb_05_0099__en-us_topic_0204854009_en-us_topic_0192954047_b125614475597">Change History</strong>.</span><p><p id="gaussdb_05_0099__p547810162817">You can view the parameter name, original parameter value, new parameter value, modification status, modification time, application status, and application time.</p>
<div class="section" id="gaussdb_05_0099__section19506644183319"><h4 class="sectiontitle">Viewing Change History of DB Instance Parameters</h4><ol id="gaussdb_05_0099__ol12467113908"><li id="gaussdb_05_0099__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_05_0099__li1742020376503"><span>Click <span><img id="gaussdb_05_0099__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_05_0099__li1142083714506"><span>Click <strong id="gaussdb_05_0099__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_05_0099__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_05_0099__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_05_0099__li1487214221809"><span>On the <strong id="gaussdb_05_0099__en-us_topic_0171122799_b5318143754">Instances</strong> page, click the target DB instance.</span></li><li id="gaussdb_05_0099__li197471512474"><span>In the navigation pane on the left, choose <strong id="gaussdb_05_0099__en-us_topic_0204854009_en-us_topic_0192954047_b556014720597">Parameters</strong>. On the displayed page, click <strong id="gaussdb_05_0099__en-us_topic_0204854009_en-us_topic_0192954047_b125614475597">Change History</strong>.</span><p><p id="gaussdb_05_0099__p547810162817">You can view the parameter name, original parameter value, new parameter value, modification status, modification time, application status, and application time.</p>
<p id="gaussdb_05_0099__p973580193617">You can apply the parameter template to DB instances as required by referring to <a href="gaussdb_05_0018.html">Applying a Parameter Template</a>.</p>
</p></li></ol>
</div>
<div class="section" id="gaussdb_05_0099__section3949533112211"><h4 class="sectiontitle">Viewing Change History of a Parameter Template</h4><ol id="gaussdb_05_0099__ol1894983372215"><li id="gaussdb_05_0099__li1570923015518"><span>Log in to the management console.</span></li><li id="gaussdb_05_0099__li17109305551"><span>Click <span><img id="gaussdb_05_0099__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_05_0099__li177101030155512"><span>Click <strong id="gaussdb_05_0099__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_05_0099__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_05_0099__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_05_0099__li89507337222"><span>Choose <span class="uicontrol" id="gaussdb_05_0099__uicontrol620214232918"><b>Parameter Template Management</b></span> in the navigation pane on the left. On the <span class="uicontrol" id="gaussdb_05_0099__uicontrol1620252316911"><b>Custom Templates</b></span> page, click the target parameter template.</span></li><li id="gaussdb_05_0099__li4950123372214"><span>On the displayed page, choose <strong id="gaussdb_05_0099__b967318502917">Change History</strong> in the navigation pane on the left.</span><p><p id="gaussdb_05_0099__p19950433102215">You can view the parameter name, original parameter value, new parameter value, modification status, and modification time.</p>
<div class="section" id="gaussdb_05_0099__section3949533112211"><h4 class="sectiontitle">Viewing Change History of a Parameter Template</h4><ol id="gaussdb_05_0099__ol1894983372215"><li id="gaussdb_05_0099__li1570923015518"><span>Log in to the management console.</span></li><li id="gaussdb_05_0099__li17109305551"><span>Click <span><img id="gaussdb_05_0099__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_05_0099__li177101030155512"><span>Click <strong id="gaussdb_05_0099__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_05_0099__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_05_0099__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_05_0099__li89507337222"><span>Choose <span class="uicontrol" id="gaussdb_05_0099__uicontrol620214232918"><b>Parameter Templates</b></span> in the navigation pane on the left. On the <span class="uicontrol" id="gaussdb_05_0099__uicontrol1620252316911"><b>Custom Templates</b></span> page, click the target parameter template.</span></li><li id="gaussdb_05_0099__li4950123372214"><span>On the displayed page, choose <strong id="gaussdb_05_0099__b967318502917">Change History</strong> in the navigation pane on the left.</span><p><p id="gaussdb_05_0099__p19950433102215">You can view the parameter name, original parameter value, new parameter value, modification status, and modification time.</p>
</p></li></ol>
</div>
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<h1 class="topictitle1">Changing a Security Group</h1>
<div id="body1603089650987"><div class="section" id="gaussdb_08_0003__section36712096194014"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_08_0003__p27667840173352">You can change the security group of a DB instance.</p>
</div>
<div class="section" id="gaussdb_08_0003__section59386647165940"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0003__o3a2715f18c35409aa98d1b471dc7b5d3"><li id="gaussdb_08_0003__li11111185020914"><span>Log in to the management console.</span></li><li id="gaussdb_08_0003__li1511135012918"><span>Click <span><img id="gaussdb_08_0003__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0003__li17111250492"><span>Click <strong id="gaussdb_08_0003__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0003__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0003__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0003__le65a8798b3894fa9b8b778a700ad84b8"><span>On the <strong id="gaussdb_08_0003__b10845155610482">Instance Management</strong> page, click the target DB instance. The <strong id="gaussdb_08_0003__b198048138524">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_08_0003__l2a5b3371b82b4bf0b87371149b3ffc1a"><span>In the <strong id="gaussdb_08_0003__b578611010490">Network Information</strong> area, click <span><img id="gaussdb_08_0003__image1152523014510" src="en-us_image_0000001403138685.png"></span> in the <span class="uicontrol" id="gaussdb_08_0003__uicontrol1678717034916"><b>Security Group</b></span> field.</span><p><ul id="gaussdb_08_0003__u81810f00684d4603bde1b8196fff8ce4"><li id="gaussdb_08_0003__l8d1751fed23547178877ffc06abf2a1e">To submit the change, click <span><img id="gaussdb_08_0003__en-us_topic_0171122553_image17386173042011" src="en-us_image_0000001403138681.png"></span>.</li><li id="gaussdb_08_0003__li62993547195615">To cancel the change, click <span><img id="gaussdb_08_0003__image13343486492" src="en-us_image_0000001403218681.png"></span>.</li></ul>
<div class="section" id="gaussdb_08_0003__section59386647165940"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0003__o3a2715f18c35409aa98d1b471dc7b5d3"><li id="gaussdb_08_0003__li11111185020914"><span>Log in to the management console.</span></li><li id="gaussdb_08_0003__li1511135012918"><span>Click <span><img id="gaussdb_08_0003__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0003__li17111250492"><span>Click <strong id="gaussdb_08_0003__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0003__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0003__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0003__le65a8798b3894fa9b8b778a700ad84b8"><span>On the <strong id="gaussdb_08_0003__b10845155610482">Instances</strong> page, click the target DB instance. The <strong id="gaussdb_08_0003__b198048138524">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_08_0003__l2a5b3371b82b4bf0b87371149b3ffc1a"><span>In the <strong id="gaussdb_08_0003__b578611010490">Network Information</strong> area, click <span><img id="gaussdb_08_0003__image1152523014510" src="en-us_image_0000001403138685.png"></span> in the <span class="uicontrol" id="gaussdb_08_0003__uicontrol1678717034916"><b>Security Group</b></span> field.</span><p><ul id="gaussdb_08_0003__u81810f00684d4603bde1b8196fff8ce4"><li id="gaussdb_08_0003__l8d1751fed23547178877ffc06abf2a1e">To submit the change, click <span><img id="gaussdb_08_0003__en-us_topic_0171122553_image17386173042011" src="en-us_image_0000001403138681.png"></span>.</li><li id="gaussdb_08_0003__li62993547195615">To cancel the change, click <span><img id="gaussdb_08_0003__image13343486492" src="en-us_image_0000001403218681.png"></span>.</li></ul>
</p></li><li id="gaussdb_08_0003__lde4afc21cfca4e758513b927fd3eb6bb"><span>Click <span><img id="gaussdb_08_0003__image162678266013830" src="en-us_image_0000001402979141.png"></span> in the upper right corner on the <span class="uicontrol" id="gaussdb_08_0003__uicontrol97835057310161"><b>Basic Information</b></span> page to view the result of the change. This process takes about 1 to 3 minutes.</span></li></ol>
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<div id="body1597738427615"><div class="section" id="gaussdb_08_0012__section3320139914619"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_08_0012__p3816237191312">You can compare DB instance parameters with a parameter template that uses the same DB engine to inspect the differences of parameter settings.</p>
<p id="gaussdb_08_0012__p1500242318419">You can also compare default parameter templates that use the same DB engine to inspect the differences of parameter settings.</p>
</div>
<div class="section" id="gaussdb_08_0012__section14597653142310"><h4 class="sectiontitle">Comparing Instance Parameters with a Parameter Template</h4><ol id="gaussdb_08_0012__ol06491612202412"><li id="gaussdb_08_0012__li612172720122"><span>Log in to the management console.</span></li><li id="gaussdb_08_0012__li1712327181216"><span>Click <span><img id="gaussdb_08_0012__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0012__li712102751213"><span>Click <strong id="gaussdb_08_0012__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0012__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0012__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0012__li0452183819206"><span>On the <span class="uicontrol" id="gaussdb_08_0012__uicontrol165141826135718"><b>Instance Management</b></span> page, click the target DB instance.</span></li><li id="gaussdb_08_0012__li19417453113013"><span>In the navigation pane on the left, choose <strong id="gaussdb_08_0012__en-us_topic_0204854008_en-us_topic_0192954286_b1816322810225">Parameters</strong>. On the displayed page, click <span class="uicontrol" id="gaussdb_08_0012__en-us_topic_0204854008_en-us_topic_0192954286_uicontrol116522842217"><b><span class="keyword" id="gaussdb_08_0012__keyword01642028112218">Compare</span></b></span> above the parameter list.</span></li><li id="gaussdb_08_0012__li2417165319308"><span>In the displayed dialog box, select a parameter template to be compared and click <strong id="gaussdb_08_0012__b1385152072318">OK</strong>.</span><p><ul id="gaussdb_08_0012__ul146887170435"><li id="gaussdb_08_0012__li568841712430">If their settings are different, the parameter names and values of both parameter templates are displayed.</li><li id="gaussdb_08_0012__li5688121734317">If the settings are the same, no data is displayed.</li></ul>
<div class="section" id="gaussdb_08_0012__section14597653142310"><h4 class="sectiontitle">Comparing Instance Parameters with a Parameter Template</h4><ol id="gaussdb_08_0012__ol06491612202412"><li id="gaussdb_08_0012__li612172720122"><span>Log in to the management console.</span></li><li id="gaussdb_08_0012__li1712327181216"><span>Click <span><img id="gaussdb_08_0012__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0012__li712102751213"><span>Click <strong id="gaussdb_08_0012__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0012__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0012__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0012__li0452183819206"><span>On the <span class="uicontrol" id="gaussdb_08_0012__uicontrol165141826135718"><b>Instances</b></span> page, click the target DB instance.</span></li><li id="gaussdb_08_0012__li19417453113013"><span>In the navigation pane on the left, choose <strong id="gaussdb_08_0012__en-us_topic_0204854008_en-us_topic_0192954286_b1816322810225">Parameters</strong>. On the displayed page, click <span class="uicontrol" id="gaussdb_08_0012__en-us_topic_0204854008_en-us_topic_0192954286_uicontrol116522842217"><b><span class="keyword" id="gaussdb_08_0012__keyword01642028112218">Compare</span></b></span> above the parameter list.</span></li><li id="gaussdb_08_0012__li2417165319308"><span>In the displayed dialog box, select a parameter template to be compared and click <strong id="gaussdb_08_0012__b1385152072318">OK</strong>.</span><p><ul id="gaussdb_08_0012__ul146887170435"><li id="gaussdb_08_0012__li568841712430">If their settings are different, the parameter names and values of both parameter templates are displayed.</li><li id="gaussdb_08_0012__li5688121734317">If the settings are the same, no data is displayed.</li></ul>
</p></li></ol>
</div>
<div class="section" id="gaussdb_08_0012__s0b4257cd13504b4e9af5cd8af578de78"><h4 class="sectiontitle">Comparing Parameter Templates</h4><ol id="gaussdb_08_0012__o8304dc8551d9425cbb647beab5562438"><li id="gaussdb_08_0012__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_08_0012__li1742020376503"><span>Click <span><img id="gaussdb_08_0012__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0012__li1142083714506"><span>Click <strong id="gaussdb_08_0012__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_08_0012__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_08_0012__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_08_0012__li1422619852217"><span>On the <strong id="gaussdb_08_0012__b838412715586">Parameter Template Management</strong> page, click <strong id="gaussdb_08_0012__b143851671589">Custom Templates</strong>. Locate the target parameter template and click <strong id="gaussdb_08_0012__b113851273585">Compare</strong> in the <strong id="gaussdb_08_0012__b1038667145820">Operation</strong> column.</span></li><li id="gaussdb_08_0012__la09cd2b51b194b27b24e6c2155a34c0d"><span>In the displayed dialog box, select a parameter template that uses the same DB engine as the target template and click <strong id="gaussdb_08_0012__b139251413175817">OK</strong>.</span><p><ul id="gaussdb_08_0012__ul573019558504"><li id="gaussdb_08_0012__li773035511508">If their settings are different, the parameter names and values of both parameter templates are displayed.</li><li id="gaussdb_08_0012__li1671418015512">If their settings are the same, no data is displayed.</li></ul>
<div class="section" id="gaussdb_08_0012__s0b4257cd13504b4e9af5cd8af578de78"><h4 class="sectiontitle">Comparing Parameter Templates</h4><ol id="gaussdb_08_0012__o8304dc8551d9425cbb647beab5562438"><li id="gaussdb_08_0012__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_08_0012__li1742020376503"><span>Click <span><img id="gaussdb_08_0012__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0012__li1142083714506"><span>Click <strong id="gaussdb_08_0012__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_08_0012__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_08_0012__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_08_0012__li1422619852217"><span>On the <strong id="gaussdb_08_0012__b838412715586">Parameter Templates </strong>page, click <strong id="gaussdb_08_0012__b143851671589">Custom Templates</strong>. Locate the target parameter template and click <strong id="gaussdb_08_0012__b113851273585">Compare</strong> in the <strong id="gaussdb_08_0012__b1038667145820">Operation</strong> column.</span></li><li id="gaussdb_08_0012__la09cd2b51b194b27b24e6c2155a34c0d"><span>In the displayed dialog box, select a parameter template that uses the same DB engine as the target template and click <strong id="gaussdb_08_0012__b139251413175817">OK</strong>.</span><p><ul id="gaussdb_08_0012__ul573019558504"><li id="gaussdb_08_0012__li773035511508">If their settings are different, the parameter names and values of both parameter templates are displayed.</li><li id="gaussdb_08_0012__li1671418015512">If their settings are the same, no data is displayed.</li></ul>
</p></li></ol>
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<p id="gaussdb_08_0014__p17189329132017">After the parameter template is replicated, you should wait at least 5 minutes before using it to create a DB instance.</p>
<p id="gaussdb_08_0014__p1218952912017">Default parameter templates cannot be replicated. You can create parameter templates based on the default ones.</p>
</div>
<div class="section" id="gaussdb_08_0014__s761901cf52004ac2bf067f6b7565c00d"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0014__oc055da409afe4dd0809162f4947c5cac"><li id="gaussdb_08_0014__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_08_0014__li1742020376503"><span>Click <span><img id="gaussdb_08_0014__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0014__li1142083714506"><span>Click <strong id="gaussdb_08_0014__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0014__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0014__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0014__li38451430172320"><span>On the <strong id="gaussdb_08_0014__b6735177171410">Parameter Template Management</strong> page, click <strong id="gaussdb_08_0014__b12736207141416">Custom Templates</strong>. Locate the target parameter template and click <strong id="gaussdb_08_0014__b27371678141">Replicate</strong> in the <strong id="gaussdb_08_0014__b1973867191417">Operation</strong> column.</span><p><p id="gaussdb_08_0014__p776884717597">Alternatively, click the target DB instance on the <span class="uicontrol" id="gaussdb_08_0014__uicontrol56771444161416"><b>Instance Management</b></span> page. On the <span class="uicontrol" id="gaussdb_08_0014__uicontrol8678174441419"><b>Parameters</b></span> page, click <span class="uicontrol" id="gaussdb_08_0014__uicontrol196791449144"><b>Export</b></span> to generate a new parameter template for future use.</p>
<div class="section" id="gaussdb_08_0014__s761901cf52004ac2bf067f6b7565c00d"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0014__oc055da409afe4dd0809162f4947c5cac"><li id="gaussdb_08_0014__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_08_0014__li1742020376503"><span>Click <span><img id="gaussdb_08_0014__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0014__li1142083714506"><span>Click <strong id="gaussdb_08_0014__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0014__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0014__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0014__li38451430172320"><span>On the <strong id="gaussdb_08_0014__b6735177171410">Parameter Templates </strong>page, click <strong id="gaussdb_08_0014__b12736207141416">Custom Templates</strong>. Locate the target parameter template and click <strong id="gaussdb_08_0014__b27371678141">Replicate</strong> in the <strong id="gaussdb_08_0014__b1973867191417">Operation</strong> column.</span><p><p id="gaussdb_08_0014__p776884717597">Alternatively, click the target DB instance on the <span class="uicontrol" id="gaussdb_08_0014__uicontrol56771444161416"><b>Instances</b></span> page. On the <span class="uicontrol" id="gaussdb_08_0014__uicontrol8678174441419"><b>Parameters</b></span> page, click <span class="uicontrol" id="gaussdb_08_0014__uicontrol196791449144"><b>Export</b></span> to generate a new parameter template for future use.</p>
</p></li><li id="gaussdb_08_0014__l238fc955fa9e4611b3f61bfe7a3fff2d"><span>In the displayed dialog box, configure required details and click <strong id="gaussdb_08_0014__b33505119151">OK</strong>.</span><p><ul id="gaussdb_08_0014__ul1291131014466"><li id="gaussdb_08_0014__li699785014466">The template name consists of 1 to 64 characters. It can contain only uppercase letters, lowercase letters, digits, hyphens (-), underscores (_), and periods (.).</li><li id="gaussdb_08_0014__li62075129144613">The template description consists of a maximum of 256 characters and cannot include line breaks or the following special characters: &gt;!&lt;"&amp;'=</li></ul>
<p id="gaussdb_08_0014__aefa594fbc8d44114815ca59bc080ba04">After the parameter template is replicated, a new template is generated in the list in the <strong id="gaussdb_08_0014__b147816915164">Customer Templates</strong> tab of the <strong id="gaussdb_08_0014__b177818901618">Parameter Template Management</strong> page.</p>
<p id="gaussdb_08_0014__aefa594fbc8d44114815ca59bc080ba04">After the parameter template is replicated, a new template is generated in the list in the <strong id="gaussdb_08_0014__b147816915164">Customer Templates</strong> tab of the <strong id="gaussdb_08_0014__b177818901618">Parameter Templates </strong>page.</p>
</p></li></ol>
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<h1 class="topictitle1">Resetting a Parameter Template</h1>
<div id="body1597738429881"><div class="section" id="gaussdb_08_0015__section732387614651"><h4 class="sectiontitle">Scenarios</h4><p id="gaussdb_08_0015__p1638354818120">You can reset all parameters in a custom parameter template to their default settings.</p>
</div>
<div class="section" id="gaussdb_08_0015__s35b89f49183c41609d978b23557270a2"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0015__o695f2c1c7b614765a3d9eb5e257b0bbd"><li id="gaussdb_08_0015__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_08_0015__li1742020376503"><span>Click <span><img id="gaussdb_08_0015__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0015__li1142083714506"><span>Click <strong id="gaussdb_08_0015__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0015__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0015__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0015__li1548631813253"><span>On the <strong id="gaussdb_08_0015__b20640752171712">Parameter Template Management</strong> page, click <strong id="gaussdb_08_0015__b26403526177">Custom Templates</strong>. Locate the target parameter template and choose <strong id="gaussdb_08_0015__b4641105219176">More</strong> &gt; <strong id="gaussdb_08_0015__b18641145217177">Reset</strong> in the <strong id="gaussdb_08_0015__b1564115261720">Operation</strong> column.</span></li><li id="gaussdb_08_0015__l98e10d639f11481db4a1162ea820f446"><span>Click <strong id="gaussdb_08_0015__b1713757191815">Yes</strong>.</span></li></ol>
<div class="section" id="gaussdb_08_0015__s35b89f49183c41609d978b23557270a2"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0015__o695f2c1c7b614765a3d9eb5e257b0bbd"><li id="gaussdb_08_0015__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_08_0015__li1742020376503"><span>Click <span><img id="gaussdb_08_0015__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0015__li1142083714506"><span>Click <strong id="gaussdb_08_0015__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0015__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0015__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0015__li1548631813253"><span>On the <strong id="gaussdb_08_0015__b20640752171712">Parameter Templates</strong> page, click <strong id="gaussdb_08_0015__b26403526177">Custom Templates</strong>. Locate the target parameter template and choose <strong id="gaussdb_08_0015__b4641105219176">More</strong> &gt; <strong id="gaussdb_08_0015__b18641145217177">Reset</strong> in the <strong id="gaussdb_08_0015__b1564115261720">Operation</strong> column.</span></li><li id="gaussdb_08_0015__l98e10d639f11481db4a1162ea820f446"><span>Click <strong id="gaussdb_08_0015__b1713757191815">Yes</strong>.</span></li></ol>
</div>
</div>
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<div class="note" id="gaussdb_08_0016__note43416589174155"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="gaussdb_08_0016__p55204986174155">You cannot modify the description of a default parameter template.</p>
</div></div>
</div>
<div class="section" id="gaussdb_08_0016__s0b4257cd13504b4e9af5cd8af578de78"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0016__o8304dc8551d9425cbb647beab5562438"><li id="gaussdb_08_0016__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_08_0016__li1742020376503"><span>Click <span><img id="gaussdb_08_0016__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0016__li1142083714506"><span>Click <strong id="gaussdb_08_0016__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0016__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0016__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0016__li380023815223"><span>On the <strong id="gaussdb_08_0016__b1873113564213">Parameter Template Management</strong> page, click <strong id="gaussdb_08_0016__b13874235154219">Custom Templates</strong>. Locate the parameter template you want to modify and click <span><img id="gaussdb_08_0016__image197413501185" src="en-us_image_0000001352379036.png"></span> in the <strong id="gaussdb_08_0016__b17874183524216">Description</strong> column.</span></li><li id="gaussdb_08_0016__li2674321182123"><span>Enter a new description. You can click <span><img id="gaussdb_08_0016__image1614272311910" src="en-us_image_0000001402858853.png"></span> to submit or <span><img id="gaussdb_08_0016__image1376955972" src="en-us_image_0000001403138721.png"></span> to cancel the modification.</span><p><ul id="gaussdb_08_0016__ul16137151182143"><li id="gaussdb_08_0016__li44455486182143">After you submit the modification, you can view the new description in the <strong id="gaussdb_08_0016__b1975992915442">Description</strong> column.</li><li id="gaussdb_08_0016__li29196881182143">The description consists of 256 characters but cannot contain the following special characters: &gt;!&lt;"&amp;'=</li></ul>
<div class="section" id="gaussdb_08_0016__s0b4257cd13504b4e9af5cd8af578de78"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0016__o8304dc8551d9425cbb647beab5562438"><li id="gaussdb_08_0016__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_08_0016__li1742020376503"><span>Click <span><img id="gaussdb_08_0016__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0016__li1142083714506"><span>Click <strong id="gaussdb_08_0016__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0016__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0016__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0016__li380023815223"><span>On the <strong id="gaussdb_08_0016__b1873113564213">Parameter Templates</strong> page, click <strong id="gaussdb_08_0016__b13874235154219">Custom Templates</strong>. Locate the parameter template you want to modify and click <span><img id="gaussdb_08_0016__image197413501185" src="en-us_image_0000001352379036.png"></span> in the <strong id="gaussdb_08_0016__b17874183524216">Description</strong> column.</span></li><li id="gaussdb_08_0016__li2674321182123"><span>Enter a new description. You can click <span><img id="gaussdb_08_0016__image1614272311910" src="en-us_image_0000001402858853.png"></span> to submit or <span><img id="gaussdb_08_0016__image1376955972" src="en-us_image_0000001403138721.png"></span> to cancel the modification.</span><p><ul id="gaussdb_08_0016__ul16137151182143"><li id="gaussdb_08_0016__li44455486182143">After you submit the modification, you can view the new description in the <strong id="gaussdb_08_0016__b1975992915442">Description</strong> column.</li><li id="gaussdb_08_0016__li29196881182143">The description consists of 256 characters but cannot contain the following special characters: &gt;!&lt;"&amp;'=</li></ul>
</p></li></ol>
</div>
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</div>
<div class="notice" id="gaussdb_08_0017__note1341366818240"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><ul id="gaussdb_08_0017__ul20383143412333"><li id="gaussdb_08_0017__li2383123473313">Deleted parameter templates cannot be recovered. Exercise caution when performing this operation.</li><li id="gaussdb_08_0017__li1468563593316">Default parameter templates cannot be deleted.</li></ul>
</div></div>
<div class="section" id="gaussdb_08_0017__s97272bf3c5b243c39b9e0dc5c2fc1972"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0017__oda5534064f704903b4d2fcb2245faae7"><li id="gaussdb_08_0017__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_08_0017__li1742020376503"><span>Click <span><img id="gaussdb_08_0017__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0017__li1142083714506"><span>Click <strong id="gaussdb_08_0017__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0017__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0017__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0017__li1643214502297"><span>On the <strong id="gaussdb_08_0017__b19511053164516">Parameter Template Management</strong> page, click <strong id="gaussdb_08_0017__b595235344515">Custom Templates</strong>. Locate the parameter template to be deleted and choose <strong id="gaussdb_08_0017__b3952105315452">More</strong> &gt; <strong id="gaussdb_08_0017__b15953135304518">Delete</strong> in the <strong id="gaussdb_08_0017__b795385318454">Operation</strong> column.</span></li><li id="gaussdb_08_0017__lb9775e1d1af344a2934c6fb8b99b8add"><span>In the displayed dialog box, click <strong id="gaussdb_08_0017__b16232162010466">Yes</strong>.</span></li></ol>
<div class="section" id="gaussdb_08_0017__s97272bf3c5b243c39b9e0dc5c2fc1972"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0017__oda5534064f704903b4d2fcb2245faae7"><li id="gaussdb_08_0017__li19419173775012"><span>Log in to the management console.</span></li><li id="gaussdb_08_0017__li1742020376503"><span>Click <span><img id="gaussdb_08_0017__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0017__li1142083714506"><span>Click <strong id="gaussdb_08_0017__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0017__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0017__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0017__li1643214502297"><span>On the <strong id="gaussdb_08_0017__b19511053164516">Parameter Templates</strong> page, click <strong id="gaussdb_08_0017__b595235344515">Custom Templates</strong>. Locate the parameter template to be deleted and choose <strong id="gaussdb_08_0017__b3952105315452">More</strong> &gt; <strong id="gaussdb_08_0017__b15953135304518">Delete</strong> in the <strong id="gaussdb_08_0017__b795385318454">Operation</strong> column.</span></li><li id="gaussdb_08_0017__lb9775e1d1af344a2934c6fb8b99b8add"><span>In the displayed dialog box, click <strong id="gaussdb_08_0017__b16232162010466">Yes</strong>.</span></li></ol>
</div>
</div>
<div>

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<h1 class="topictitle1">Exporting Parameters</h1>
<div id="body1597738426237"><div class="section" id="gaussdb_08_0042__section2406221536"><h4 class="sectiontitle">Scenarios</h4><ul id="gaussdb_08_0042__ul13753132517462"><li id="gaussdb_08_0042__li2753125164611">You can export a parameter template of a DB instance for future use. You can apply the exported parameter template to DB instances by referring to <a href="gaussdb_05_0018.html">Applying a Parameter Template</a>.</li><li id="gaussdb_08_0042__li20633182716532">You can export the parameter template details (parameter names, values, and descriptions) of a DB instance to a CSV file for review and analysis.</li></ul>
</div>
<div class="section" id="gaussdb_08_0042__section1472455119616"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0042__ol12467113908"><li id="gaussdb_08_0042__li612172720122"><span>Log in to the management console.</span></li><li id="gaussdb_08_0042__li1712327181216"><span>Click <span><img id="gaussdb_08_0042__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0042__li712102751213"><span>Click <strong id="gaussdb_08_0042__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0042__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0042__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0042__li1487214221809"><span>On the <strong id="gaussdb_08_0042__en-us_topic_0171122799_b5318143754">Instance Management</strong> page, click the target DB instance.</span></li><li id="gaussdb_08_0042__li197471512474"><span>In the navigation pane on the left, choose <strong id="gaussdb_08_0042__b5109201514552">Parameters</strong>. On the displayed page, click <strong id="gaussdb_08_0042__b141121215145513">Export</strong> above the parameter list.</span><p><p id="gaussdb_08_0042__p11299119308">The parameter template information (parameter names, values, and descriptions) of a DB instance is exported to a CSV file. In the displayed dialog box, enter the file name and click <strong id="gaussdb_08_0042__b114798139393">OK</strong>. You can export parameter template details (parameter names, values, and descriptions) of an instance to a CSV file for review and analysis.</p>
<div class="section" id="gaussdb_08_0042__section1472455119616"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_08_0042__ol12467113908"><li id="gaussdb_08_0042__li612172720122"><span>Log in to the management console.</span></li><li id="gaussdb_08_0042__li1712327181216"><span>Click <span><img id="gaussdb_08_0042__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0042__li712102751213"><span>Click <strong id="gaussdb_08_0042__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0042__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0042__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0042__li1487214221809"><span>On the <strong id="gaussdb_08_0042__en-us_topic_0171122799_b5318143754">Instances</strong> page, click the target DB instance.</span></li><li id="gaussdb_08_0042__li197471512474"><span>In the navigation pane on the left, choose <strong id="gaussdb_08_0042__b5109201514552">Parameters</strong>. On the displayed page, click <strong id="gaussdb_08_0042__b141121215145513">Export</strong> above the parameter list.</span><p><p id="gaussdb_08_0042__p11299119308">The parameter template information (parameter names, values, and descriptions) of a DB instance is exported to a CSV file. In the displayed dialog box, enter the file name and click <strong id="gaussdb_08_0042__b114798139393">OK</strong>. You can export parameter template details (parameter names, values, and descriptions) of an instance to a CSV file for review and analysis.</p>
<div class="note" id="gaussdb_08_0042__note3124192913013"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="gaussdb_08_0042__p249913421309">The file name contains 4 to 81 characters and must start with a letter. It can contain only letters, digits, hyphens (-), and underscores (_).</p>
</div></div>
</p></li></ol>

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<p id="gaussdb_08_0112__p18536553173910">You can change parameter values in custom parameter templates only, but cannot change parameter values in default parameter templates. When you change parameter values in a custom parameter template, the changes take effect for all DB instances to which the parameter template applies.</p>
<div class="note" id="gaussdb_08_0112__note18110437214655"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="gaussdb_08_0112__p28776210214655">GaussDB(for MySQL) has default parameter templates whose parameter values cannot be changed. You can view these parameter values by clicking the default parameter templates. If a custom parameter template is set incorrectly and causes a database reboot to fail, you can re-configure the custom parameter template according to the configurations of the default parameter template.</p>
</div></div>
<div class="section" id="gaussdb_08_0112__section1759510381059"><h4 class="sectiontitle">Modifying Parameter Template Parameters</h4><ol id="gaussdb_08_0112__ol24590471123443"><li id="gaussdb_08_0112__li114342521119"><span>Log in to the management console.</span></li><li id="gaussdb_08_0112__li243425261113"><span>Click <span><img id="gaussdb_08_0112__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0112__li0435652111111"><span>Click <strong id="gaussdb_08_0112__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0112__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0112__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0112__li35081232123443"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_08_0112__uicontrol1552564517466"><b>Parameter Template Management</b></span>. On the <span class="uicontrol" id="gaussdb_08_0112__uicontrol10534194564614"><b>Custom Templates</b></span> page, click the parameter template you want to view.</span></li><li id="gaussdb_08_0112__li25101895123443"><span>Modify parameters as required.</span><p><p id="gaussdb_08_0112__p3611601215161">Available operations are as follows:</p>
<div class="section" id="gaussdb_08_0112__section1759510381059"><h4 class="sectiontitle">Modifying Parameter Template Parameters</h4><ol id="gaussdb_08_0112__ol24590471123443"><li id="gaussdb_08_0112__li114342521119"><span>Log in to the management console.</span></li><li id="gaussdb_08_0112__li243425261113"><span>Click <span><img id="gaussdb_08_0112__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0112__li0435652111111"><span>Click <strong id="gaussdb_08_0112__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_08_0112__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_08_0112__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_08_0112__li35081232123443"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_08_0112__uicontrol1552564517466"><b>Parameter Templates</b></span>. On the <span class="uicontrol" id="gaussdb_08_0112__uicontrol10534194564614"><b>Custom Templates</b></span> page, click the parameter template you want to view.</span></li><li id="gaussdb_08_0112__li25101895123443"><span>Modify parameters as required.</span><p><p id="gaussdb_08_0112__p3611601215161">Available operations are as follows:</p>
<div class="notice" id="gaussdb_08_0112__note339120655715"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_08_0112__p1238072318404">After you modify parameters in a parameter template, some modifications immediately take effect for the DB instance to which the parameter template applies. Exercise caution when performing this operation.</p>
</div></div>
<ul id="gaussdb_08_0112__ul972012817919"><li id="gaussdb_08_0112__li1472012281590">To save the modifications, click <strong id="gaussdb_08_0112__en-us_topic_0171122799_b1929814521819">Save</strong>.</li><li id="gaussdb_08_0112__li4720328397">To cancel the modifications, click <strong id="gaussdb_08_0112__en-us_topic_0171122799_b5241041249">Cancel</strong>.</li><li id="gaussdb_08_0112__li197201281893">To preview the modifications, click <strong id="gaussdb_08_0112__en-us_topic_0171122799_b179491958512">Preview</strong>.</li></ul>
@ -16,13 +16,13 @@
</div>
</p></li></ol>
</div>
<div class="section" id="gaussdb_08_0112__section360115386520"><h4 class="sectiontitle">Modifying Instance Parameters</h4><ol id="gaussdb_08_0112__ol12467113908"><li id="gaussdb_08_0112__li1090091964011"><span>Log in to the management console.</span></li><li id="gaussdb_08_0112__li1290061916408"><span>Click <span><img id="gaussdb_08_0112__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0112__li190091974010"><span>Click <strong id="gaussdb_08_0112__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_08_0112__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_08_0112__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_08_0112__li12746132461015"><span>On the <strong id="gaussdb_08_0112__b2622190184315">Instance Management</strong> page, click the target DB instance. The <strong id="gaussdb_08_0112__b194981422378">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_08_0112__li153155815615"><span>In the navigation pane on the left, choose <strong id="gaussdb_08_0112__b20419434155210">Parameters</strong>. On the displayed page, modify parameters as required.</span><p><p id="gaussdb_08_0112__p135994416107">Available operations are as follows:</p>
<div class="section" id="gaussdb_08_0112__section360115386520"><h4 class="sectiontitle">Modifying Instance Parameters</h4><ol id="gaussdb_08_0112__ol12467113908"><li id="gaussdb_08_0112__li1090091964011"><span>Log in to the management console.</span></li><li id="gaussdb_08_0112__li1290061916408"><span>Click <span><img id="gaussdb_08_0112__gaussdb_02_0004_image192529212293_1" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_08_0112__li190091974010"><span>Click <strong id="gaussdb_08_0112__gaussdb_02_0004_b4353193615913_1">Service List</strong>. Under <strong id="gaussdb_08_0112__gaussdb_02_0004_b163533362595_1">Database</strong>, click <strong id="gaussdb_08_0112__gaussdb_02_0004_b53539368593_1">GaussDB</strong>.</span></li><li id="gaussdb_08_0112__li12746132461015"><span>On the <strong id="gaussdb_08_0112__b2622190184315">Instances</strong> page, click the target DB instance. The <strong id="gaussdb_08_0112__b194981422378">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_08_0112__li153155815615"><span>In the navigation pane on the left, choose <strong id="gaussdb_08_0112__b20419434155210">Parameters</strong>. On the displayed page, modify parameters as required.</span><p><p id="gaussdb_08_0112__p135994416107">Available operations are as follows:</p>
<div class="notice" id="gaussdb_08_0112__note18602164161013"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="gaussdb_08_0112__p189059674513"></p>
<p id="gaussdb_08_0112__p891036104515"></p>
<div class="p" id="gaussdb_08_0112__p1067882243513">Check the value in the <span class="uicontrol" id="gaussdb_08_0112__en-us_topic_0171122799_uicontrol83171621560"><b>Effective upon Reboot</b></span> column.<ul id="gaussdb_08_0112__ul13224155111516"><li id="gaussdb_08_0112__li7224655171519">If the value is <strong id="gaussdb_08_0112__b1491210712537">Yes</strong> and the DB instance status on the <strong id="gaussdb_08_0112__b491315775313">Instance Management</strong> page is <span class="uicontrol" id="gaussdb_08_0112__uicontrol179141271534"><b>Pending reboot</b></span>, you must reboot the DB instance for the modifications of this parameter to take effect.</li><li id="gaussdb_08_0112__li181312169177">If the value is <strong id="gaussdb_08_0112__en-us_topic_0171122799_b18611230461">No</strong>, the modification of this parameter takes effect immediately.</li></ul>
<div class="p" id="gaussdb_08_0112__p1067882243513">Check the value in the <span class="uicontrol" id="gaussdb_08_0112__en-us_topic_0171122799_uicontrol83171621560"><b>Effective upon Reboot</b></span> column.<ul id="gaussdb_08_0112__ul13224155111516"><li id="gaussdb_08_0112__li7224655171519">If the value is <strong id="gaussdb_08_0112__b1491210712537">Yes</strong> and the DB instance status on the <strong id="gaussdb_08_0112__b491315775313">Instances</strong> page is <span class="uicontrol" id="gaussdb_08_0112__uicontrol179141271534"><b>Pending reboot</b></span>, you must reboot the DB instance for the modifications of this parameter to take effect.</li><li id="gaussdb_08_0112__li181312169177">If the value is <strong id="gaussdb_08_0112__en-us_topic_0171122799_b18611230461">No</strong>, the modification of this parameter takes effect immediately.</li></ul>
</div>
</div></div>
<ul id="gaussdb_08_0112__ul17600104171012"><li id="gaussdb_08_0112__li8601341191010">To save the modifications, click <strong id="gaussdb_08_0112__b336816883">Save</strong>.</li><li id="gaussdb_08_0112__li1160384118105">To cancel the modifications, click <strong id="gaussdb_08_0112__b745769770">Cancel</strong>.</li><li id="gaussdb_08_0112__li1605124101011">To preview the modifications, click <strong id="gaussdb_08_0112__b2135268093">Preview</strong>.</li></ul>
<ul id="gaussdb_08_0112__ul17600104171012"><li id="gaussdb_08_0112__li8601341191010">To save the modifications, click <strong id="gaussdb_08_0112__b475596804">Save</strong>.</li><li id="gaussdb_08_0112__li1160384118105">To cancel the modifications, click <strong id="gaussdb_08_0112__b244489554">Cancel</strong>.</li><li id="gaussdb_08_0112__li1605124101011">To preview the modifications, click <strong id="gaussdb_08_0112__b1876331649">Preview</strong>.</li></ul>
<p id="gaussdb_08_0112__p1658622214263">After parameters are modified, you can click <strong id="gaussdb_08_0112__en-us_topic_0171122799_b187031050567">Change History</strong> to view parameter modification details.</p>
</p></li></ol>
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<h1 class="topictitle1">Enabling Read/Write Splitting</h1>
<div id="body1597049711197"><p id="gaussdb_11_0017__en-us_topic_0200110321_p874144912514">Read/write splitting enables read and write requests to be automatically routed through a read/write splitting address. This section describes how to enable read/write splitting.</p>
<div class="section" id="gaussdb_11_0017__en-us_topic_0200110321_section175771041253"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_11_0017__en-us_topic_0200110321_ol209692033144919"><li id="gaussdb_11_0017__en-us_topic_0000001349991108_li192192823813"><span>Log in to the console.</span></li><li id="gaussdb_11_0017__en-us_topic_0000001349991108_li52192818385"><span>Click <span><img id="gaussdb_11_0017__en-us_topic_0000001400271017_image192529212293" src="en-us_image_0000001400391461.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_11_0017__en-us_topic_0000001349991108_li1582112133514"><span>Under <strong id="gaussdb_11_0017__en-us_topic_0000001400271017_b19831738172519">Database</strong>, click <strong id="gaussdb_11_0017__en-us_topic_0000001400271017_b10835382257">GaussDB</strong>. In the navigation pane on the left, click <strong id="gaussdb_11_0017__en-us_topic_0000001400271017_b9309121415288"><span id="gaussdb_11_0017__en-us_topic_0000001400271017_text12712145431415">GaussDB(for MySQL)</span></strong>.</span></li><li id="gaussdb_11_0017__en-us_topic_0200110321_li61613191202055"><span>On the <span class="uicontrol" id="gaussdb_11_0017__uicontrol6125026163410"><b>Instance Management</b></span> page, click the target DB instance. The <span class="uicontrol" id="gaussdb_11_0017__uicontrol34611732113130"><b>Basic Information</b></span> page is displayed.</span></li><li id="gaussdb_11_0017__en-us_topic_0200110321_li13253161841616"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_11_0017__uicontrol1545999125718"><b>Database Proxy</b></span>.</span><p><div class="fignone" id="gaussdb_11_0017__en-us_topic_0200110321_fig20566147102714"><span class="figcap"><b>Figure 1 </b>Enabling read/write splitting</span><br><span><img id="gaussdb_11_0017__en-us_topic_0200110321_image9566547182715" src="en-us_image_0000001352059444.png"></span></div>
<div class="section" id="gaussdb_11_0017__en-us_topic_0200110321_section175771041253"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_11_0017__en-us_topic_0200110321_ol209692033144919"><li id="gaussdb_11_0017__en-us_topic_0000001349991108_li192192823813"><span>Log in to the console.</span></li><li id="gaussdb_11_0017__en-us_topic_0000001349991108_li52192818385"><span>Click <span><img id="gaussdb_11_0017__en-us_topic_0000001400271017_image192529212293" src="en-us_image_0000001400391461.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_11_0017__en-us_topic_0000001349991108_li1582112133514"><span>Under <strong id="gaussdb_11_0017__en-us_topic_0000001400271017_b19831738172519">Database</strong>, click <strong id="gaussdb_11_0017__en-us_topic_0000001400271017_b10835382257">GaussDB</strong>. In the navigation pane on the left, click <strong id="gaussdb_11_0017__en-us_topic_0000001400271017_b9309121415288"><span id="gaussdb_11_0017__en-us_topic_0000001400271017_text12712145431415">GaussDB(for MySQL)</span></strong>.</span></li><li id="gaussdb_11_0017__en-us_topic_0200110321_li61613191202055"><span>On the <span class="uicontrol" id="gaussdb_11_0017__uicontrol6125026163410"><b>Instances</b></span> page, click the target DB instance. The <span class="uicontrol" id="gaussdb_11_0017__uicontrol34611732113130"><b>Basic Information</b></span> page is displayed.</span></li><li id="gaussdb_11_0017__en-us_topic_0200110321_li13253161841616"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_11_0017__uicontrol1545999125718"><b>Database Proxy</b></span>.</span><p><div class="fignone" id="gaussdb_11_0017__en-us_topic_0200110321_fig20566147102714"><span class="figcap"><b>Figure 1 </b>Enabling read/write splitting</span><br><span><img id="gaussdb_11_0017__en-us_topic_0200110321_image9566547182715" src="en-us_image_0000001352059444.png"></span></div>
</p></li><li id="gaussdb_11_0017__li1347114720415"><span>Click <strong id="gaussdb_11_0017__b171731032891">Create Proxy Instance</strong>.</span></li><li id="gaussdb_11_0017__li721919819389"><span>In the displayed dialog box, configure required parameters and click <strong id="gaussdb_11_0017__b62866451898">OK</strong>. After a proxy instance has been created, you can click <strong id="gaussdb_11_0017__b22519499917">Create Proxy Instance</strong> in the <strong id="gaussdb_11_0017__b82514491996">Database Proxy</strong> page to add a new proxy instance.</span><p><ul id="gaussdb_11_0017__en-us_topic_0000001349831208_ul224614214398"><li id="gaussdb_11_0017__en-us_topic_0000001349831208_li182464216391"><strong id="gaussdb_11_0017__b033920530911">Proxy Instance Name</strong>: Enter 4 to 64 characters starting with a letter. Only letters (case-sensitive), digits, hyphens (-), and underscores (_) are allowed.</li><li id="gaussdb_11_0017__en-us_topic_0000001349831208_li6261037907"><strong id="gaussdb_11_0017__b99261655793">Proxy Mode</strong>: Select <strong id="gaussdb_11_0017__b59266552919">Read/Write</strong> or <strong id="gaussdb_11_0017__b19926205511919">Read-only</strong>.<div class="note" id="gaussdb_11_0017__en-us_topic_0000001349831208_note121062045502"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="gaussdb_11_0017__en-us_topic_0000001349831208_ul11108141195215"><li id="gaussdb_11_0017__en-us_topic_0000001349831208_li710812119522"><strong id="gaussdb_11_0017__b4591858595">Read/Write</strong>: All write requests are forwarded only to the primary node, and all read requests are forwarded to the selected nodes based on the read weights. The default read weight of the primary node is <strong id="gaussdb_11_0017__b132231109100">0</strong>.</li><li id="gaussdb_11_0017__en-us_topic_0000001349831208_li759158144914"><strong id="gaussdb_11_0017__b725033101013">Read-only</strong>: All read requests are forwarded to the selected read replicas based on read weights. Even if the primary node is assigned with a read weight, the weight does not take effect.<ul id="gaussdb_11_0017__en-us_topic_0000001349831208_ul49812503531"><li id="gaussdb_11_0017__en-us_topic_0000001349831208_li1034018186510">It supports only read requests. If write requests are forwarded to the selected nodes, an error message is displayed.</li><li id="gaussdb_11_0017__en-us_topic_0000001349831208_li282153135320">This mode offloads the pressure of the primary node by routing all read requests to read replicas.</li><li id="gaussdb_11_0017__en-us_topic_0000001349831208_li17340418195116">DDL, DML, and temporary table operations are not supported in the read-only mode.</li></ul>
</li></ul>
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<h1 class="topictitle1">Assigning Read Weights</h1>
<div id="body1597049711575"><p id="gaussdb_11_0018__en-us_topic_0200110322_p4233133394314">After read/write splitting is enabled, you can assign read weights as required.</p>
<div class="section" id="gaussdb_11_0018__en-us_topic_0268874075_section222918216916"><h4 class="sectiontitle">Description</h4><ul id="gaussdb_11_0018__en-us_topic_0268874075_ul575574719918"><li id="gaussdb_11_0018__en-us_topic_0268874075_li16756147591">After read/write splitting is enabled, you can assign read weights for the primary node and read replicas.</li><li id="gaussdb_11_0018__en-us_topic_0268874075_li42671243111220">The default read weight of the primary node is 0. The higher read weight the primary node is assigned, the more read requests it can process.</li><li id="gaussdb_11_0018__li8469163003110">If the read weight of a read replica is 0, the read replica does not process any read requests.</li><li id="gaussdb_11_0018__en-us_topic_0268874075_li167211480910">The weight of a read replica ranges from 0 to 1000.</li><li id="gaussdb_11_0018__en-us_topic_0268874075_li1115413394400">For details about how to assign read weights, see <a href="#gaussdb_11_0018__en-us_topic_0200110324_section18253121664211">Weight Assignment Rules</a>.</li></ul>
<div class="section" id="gaussdb_11_0018__en-us_topic_0268874075_section222918216916"><h4 class="sectiontitle">Description</h4><ul id="gaussdb_11_0018__en-us_topic_0268874075_ul575574719918"><li id="gaussdb_11_0018__en-us_topic_0268874075_li16756147591">After read/write splitting is enabled, you can assign read weights for the primary node and read replicas.</li><li id="gaussdb_11_0018__en-us_topic_0268874075_li42671243111220">The default read weight of the primary node is 0. The higher read weight the primary node is assigned, the more read requests it can process.</li><li id="gaussdb_11_0018__li8469163003110">When the read weights of all nodes are 0, services are not affected. In this case, the primary node processes all read and write requests by default.</li><li id="gaussdb_11_0018__en-us_topic_0268874075_li167211480910">The weight of a read replica ranges from 0 to 1000.</li><li id="gaussdb_11_0018__en-us_topic_0268874075_li1115413394400">For details about how to assign read weights, see <a href="#gaussdb_11_0018__en-us_topic_0200110324_section18253121664211">Weight Assignment Rules</a>.</li></ul>
</div>
<div class="section" id="gaussdb_11_0018__en-us_topic_0200110324_section18253121664211"><a name="gaussdb_11_0018__en-us_topic_0200110324_section18253121664211"></a><a name="en-us_topic_0200110324_section18253121664211"></a><h4 class="sectiontitle">Weight Assignment Rules</h4><div class="p" id="gaussdb_11_0018__en-us_topic_0200110324_p2761051154">When the system automatically assigns read weights to read replicas, the weight values are fixed.<div class="note" id="gaussdb_11_0018__en-us_topic_0200110324_note154083114818"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="gaussdb_11_0018__en-us_topic_0200110324_p6482509126">The default weight equals to the number of vCPUs multiplied by 50. The weight ranges from 100 to 1000.</p>
<p id="gaussdb_11_0018__en-us_topic_0200110324_p174221147171214">For example:</p>
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</div></div>
</div>
</div>
<div class="section" id="gaussdb_11_0018__section99611916460"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_11_0018__en-us_topic_0000001212451138_ol196101742919"><li id="gaussdb_11_0018__en-us_topic_0000001212451138_li156105421117"><span>Log in to the console.</span></li><li id="gaussdb_11_0018__en-us_topic_0000001212451138_li1961012423119"><span>Click <span><img id="gaussdb_11_0018__en-us_topic_0000001257211019_image192529212293" src="en-us_image_0000001212611256.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_11_0018__en-us_topic_0000001349991108_li1582112133514"><span>Under <strong id="gaussdb_11_0018__en-us_topic_0000001400271017_b19831738172519">Database</strong>, click <strong id="gaussdb_11_0018__en-us_topic_0000001400271017_b10835382257">GaussDB</strong>. In the navigation pane on the left, click <strong id="gaussdb_11_0018__en-us_topic_0000001400271017_b9309121415288"><span id="gaussdb_11_0018__en-us_topic_0000001400271017_text12712145431415">GaussDB(for MySQL)</span></strong>.</span></li><li id="gaussdb_11_0018__en-us_topic_0000001212451138_li6610194212115"><span>On the <strong id="gaussdb_11_0018__b3506164022919">Instance Management</strong> page, click the instance name to go to the <strong id="gaussdb_11_0018__b1850644017295">Basic Information</strong> page.</span></li><li id="gaussdb_11_0018__en-us_topic_0000001212451138_li36101542914"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_11_0018__uicontrol337241432314"><b>Database Proxy</b></span>. On the displayed page, click the <span class="uicontrol" id="gaussdb_11_0018__uicontrol14372181472316"><b>Read/Write Splitting</b></span> tab.</span></li><li id="gaussdb_11_0018__en-us_topic_0000001212451138_li26111542612"><span>In the displayed dialog box, select read replicas for which you want to assign weights on the left and assign the weights on the right.</span><p><ul id="gaussdb_11_0018__en-us_topic_0000001400271097_ul15548204518213"><li id="gaussdb_11_0018__en-us_topic_0000001400271097_li1548194511218">Different applications can connect to the instance through the read/write splitting addresses of different proxy instances. Read requests are routed to the proxy instances that applications connect to. You can also add nodes to or remove nodes from proxy instances.</li></ul>
<div class="section" id="gaussdb_11_0018__section99611916460"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_11_0018__en-us_topic_0000001212451138_ol196101742919"><li id="gaussdb_11_0018__en-us_topic_0000001212451138_li156105421117"><span>Log in to the console.</span></li><li id="gaussdb_11_0018__en-us_topic_0000001212451138_li1961012423119"><span>Click <span><img id="gaussdb_11_0018__en-us_topic_0000001257211019_image192529212293" src="en-us_image_0000001212611256.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_11_0018__en-us_topic_0000001349991108_li1582112133514"><span>Under <strong id="gaussdb_11_0018__en-us_topic_0000001400271017_b19831738172519">Database</strong>, click <strong id="gaussdb_11_0018__en-us_topic_0000001400271017_b10835382257">GaussDB</strong>. In the navigation pane on the left, click <strong id="gaussdb_11_0018__en-us_topic_0000001400271017_b9309121415288"><span id="gaussdb_11_0018__en-us_topic_0000001400271017_text12712145431415">GaussDB(for MySQL)</span></strong>.</span></li><li id="gaussdb_11_0018__en-us_topic_0000001212451138_li6610194212115"><span>On the <strong id="gaussdb_11_0018__b3506164022919">Instances</strong> page, click the instance name to go to the <strong id="gaussdb_11_0018__b1850644017295">Basic Information</strong> page.</span></li><li id="gaussdb_11_0018__en-us_topic_0000001212451138_li36101542914"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_11_0018__uicontrol337241432314"><b>Database Proxy</b></span>. On the displayed page, click the <span class="uicontrol" id="gaussdb_11_0018__uicontrol14372181472316"><b>Read/Write Splitting</b></span> tab.</span></li><li id="gaussdb_11_0018__en-us_topic_0000001212451138_li26111542612"><span>In the displayed dialog box, select read replicas for which you want to assign weights on the left and assign the weights on the right.</span><p><ul id="gaussdb_11_0018__en-us_topic_0000001400271097_ul15548204518213"><li id="gaussdb_11_0018__en-us_topic_0000001400271097_li1548194511218">Different applications can connect to the instance through the read/write splitting addresses of different proxy instances. Read requests are routed to the proxy instances that applications connect to. You can also add nodes to or remove nodes from proxy instances.</li></ul>
<ul id="gaussdb_11_0018__en-us_topic_0000001400271097_ul2740022132112"><li id="gaussdb_11_0018__en-us_topic_0000001400271097_li1734712121310">In the read/write mode, all write requests are routed to the primary node, and read requests are routed to each node based on the read weights.</li><li id="gaussdb_11_0018__en-us_topic_0000001400271097_li24321417114411">In the read-only mode, only read requests can be routed to read replicas based on the read weights. Even if the primary node is assigned with a read weight, the weight does not take effect.</li></ul>
<p id="gaussdb_11_0018__en-us_topic_0000001400271097_p8486114417151">For example, a DB instance contains one primary node and two read replicas, and two proxy instances have been enabled. Proxy instance 1 is in the read/write mode. The primary node and read replica 1 are connected to proxy instance 1 and assigned with a read weight of 100 and 200, respectively. They process read requests in the ratio of 1:2, that is, the primary node processes 1/3 read requests and read replica 1 processes 2/3 read requests. Write requests are automatically routed to the primary node. Proxy instance 2 is in read-only mode. The primary node and read replica 2 are associated with proxy instance 2 and assigned with a read weight of 100 and 200, respectively. In this case, the weight of the primary node does not take effect, and read replica 2 processes all read requests.</p>
<div class="fignone" id="gaussdb_11_0018__en-us_topic_0000001400271097_fig10231172218011"><span class="figcap"><b>Figure 1 </b>Ratio of read requests processed by each node in multiple proxy instances</span><br><span><img id="gaussdb_11_0018__image632202111238" src="en-us_image_0000001423775818.png"></span></div>

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<h1 class="topictitle1">Disabling Read/Write Splitting</h1>
<div id="body1597049711580"><p id="gaussdb_11_0019__en-us_topic_0200110323_p1583473018572">You can disable read/write splitting as required.</p>
<div class="section" id="gaussdb_11_0019__en-us_topic_0200110323_section261575113562"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_11_0019__en-us_topic_0200110323_ol05963212212"><li id="gaussdb_11_0019__li612172720122"><span>Log in to the management console.</span></li><li id="gaussdb_11_0019__li1712327181216"><span>Click <span><img id="gaussdb_11_0019__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_11_0019__li712102751213"><span>Click <strong id="gaussdb_11_0019__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_11_0019__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_11_0019__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_11_0019__li118194625416"><span>On the <strong id="gaussdb_11_0019__b11981506245">Instance Management</strong> page, click the target DB instance. The <strong id="gaussdb_11_0019__b109995072412">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_11_0019__li38114618540"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_11_0019__uicontrol7142857016"><b>Database Proxy</b></span>.</span></li><li id="gaussdb_11_0019__li1813818233307"><span>On the <strong id="gaussdb_11_0019__b1216163653817">Database Proxy</strong> page, locate the desired proxy instance and click <strong id="gaussdb_11_0019__b1161103673811">Disable Database Proxy</strong> in the <strong id="gaussdb_11_0019__b216123653814">Operation</strong> column. In the displayed dialog box, click <strong id="gaussdb_11_0019__b1122111395382">Yes</strong>.</span><p><div class="note" id="gaussdb_11_0019__en-us_topic_0000001349511668_note978220202371"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="gaussdb_11_0019__en-us_topic_0000001349511668_p1378382014379">If database proxy is disabled, read/write splitting is also disabled and services using the read/write splitting address are interrupted. You need to switch your applications to the DB instance address.</p>
<div class="section" id="gaussdb_11_0019__en-us_topic_0200110323_section261575113562"><h4 class="sectiontitle">Procedure</h4><ol id="gaussdb_11_0019__en-us_topic_0200110323_ol05963212212"><li id="gaussdb_11_0019__li612172720122"><span>Log in to the management console.</span></li><li id="gaussdb_11_0019__li1712327181216"><span>Click <span><img id="gaussdb_11_0019__gaussdb_02_0004_image192529212293" src="en-us_image_0000001352219100.png"></span> in the upper left corner and select a region and a project.</span></li><li id="gaussdb_11_0019__li712102751213"><span>Click <strong id="gaussdb_11_0019__gaussdb_02_0004_b4353193615913">Service List</strong>. Under <strong id="gaussdb_11_0019__gaussdb_02_0004_b163533362595">Database</strong>, click <strong id="gaussdb_11_0019__gaussdb_02_0004_b53539368593">GaussDB</strong>.</span></li><li id="gaussdb_11_0019__li118194625416"><span>On the <strong id="gaussdb_11_0019__b11981506245">Instances</strong> page, click the target DB instance. The <strong id="gaussdb_11_0019__b109995072412">Basic Information</strong> page is displayed.</span></li><li id="gaussdb_11_0019__li38114618540"><span>In the navigation pane on the left, choose <span class="uicontrol" id="gaussdb_11_0019__uicontrol7142857016"><b>Database Proxy</b></span>.</span></li><li id="gaussdb_11_0019__li1813818233307"><span>On the <strong id="gaussdb_11_0019__b1216163653817">Database Proxy</strong> page, locate the desired proxy instance and click <strong id="gaussdb_11_0019__b1161103673811">Disable Database Proxy</strong> in the <strong id="gaussdb_11_0019__b216123653814">Operation</strong> column. In the displayed dialog box, click <strong id="gaussdb_11_0019__b1122111395382">Yes</strong>.</span><p><div class="note" id="gaussdb_11_0019__en-us_topic_0000001349511668_note978220202371"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="gaussdb_11_0019__en-us_topic_0000001349511668_p1378382014379">If database proxy is disabled, read/write splitting is also disabled and services using the read/write splitting address are interrupted. You need to switch your applications to the DB instance address.</p>
</div></div>
</p></li></ol>
</div>