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DAS UMN Initial version

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Reviewed-by: gtema <artem.goncharov@gmail.com>
Co-authored-by: Wang , Deng Ke <wangdengke2@huawei.com>
Co-committed-by: Wang , Deng Ke <wangdengke2@huawei.com>
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Wang , Deng Ke 2022-10-18 12:51:00 +00:00 committed by zuul
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<h1 class="topictitle1">Service Overview</h1>
<div id="body35717517"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_01_0002.html">What Is Data Admin Service?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_01_0005.html">Basic Concepts</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_01_0008.html">Advantages</a></strong><br>
</li>
</ul>
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<h1 class="topictitle1">What Is Data Admin Service?</h1>
<div id="body1508830990967"><p id="das_01_0002__p4981175485915">Data Admin Service (DAS) is a one-stop cloud database management platform that allows you to manage databases on a web console. It offers database development, O&amp;M, intelligent diagnosis, and enterprise-level DevOps, making it easy to use and maintain your databases. DAS provides a best-in-class experience. With it, you do not need to install a local client for visualized operations. In addition, diverse database development functions are available, including data and table structure synchronization, online editing, and intelligent prompts for SQL input.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_01_0001.html">Service Overview</a></div>
</div>
</div>

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<h1 class="topictitle1">Basic Concepts</h1>
<div id="body1481013440635"><div class="section" id="das_01_0005__section83635424598"><h4 class="sectiontitle">Connection Address</h4><p id="das_01_0005__p595214611593">An IP address, which is used for the DAS service to connect to databases.</p>
</div>
<div class="section" id="das_01_0005__section19774657164618"><h4 class="sectiontitle">Metadata Collection</h4><p id="das_01_0005__p4998142592419">DAS periodically collects the metadata of DB instance databases, tables, and fields and stores the collected data in the DAS database.</p>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_01_0001.html">Service Overview</a></div>
</div>
</div>

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<h1 class="topictitle1">Advantages</h1>
<div id="body1523189269721"><p id="das_01_0008__p11560115201610">DAS supports different types of DB instances, such as GaussDB(for openGauss), GaussDB(for MySQL), and GaussDB(for Cassandra). It provides visual GUI operations, making your database management easy and efficient.</p>
<div class="section" id="das_01_0008__section13743025318"><h4 class="sectiontitle">Anytime, Anywhere</h4><p id="das_01_0008__p0485182142310">A DAS web console frees you from installing clients locally and supports access anytime, anywhere.</p>
</div>
<div class="section" id="das_01_0008__section15988324314"><h4 class="sectiontitle">Kernel Source Code Optimization</h4><p id="das_01_0008__p187831522202418">The kernel is optimized and enhanced to support functions such as emergent database O&amp;M and SQL explorer, to resolve O&amp;M pain points.</p>
</div>
<div class="section" id="das_01_0008__section4171015414"><h4 class="sectiontitle">Secure Operations</h4><p id="das_01_0008__p05701257259">Built-in security mechanisms guarantee stability of your databases so you can worry less about security and stay focused on operations. For example, if a user executes a slow SQL statement, DAS automatically uses a timeout mechanism to protect databases against jitter caused by long execution time.</p>
</div>
<div class="section" id="das_01_0008__section161006246512"><h4 class="sectiontitle">Robust Features</h4><p id="das_01_0008__p4781181915271">With DAS, a wide range of features are available for you to choose from, such as binlog-based data tracking and rollback, SQL statement diagnosis, scheduled SQL task execution, up to 10 GB SQL file import and export, and cross-instance database table structure synchronization. DAS, currently, supports only GaussDB(for openGauss) databases.</p>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_01_0001.html">Service Overview</a></div>
</div>
</div>

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<h1 class="topictitle1">Getting Started</h1>
<div id="body1602471999448"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_02_0002.html">Intelligent O&amp;M</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_02_0006.html">Data Management</a></strong><br>
</li>
</ul>
</div>

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<h1 class="topictitle1">Intelligent O&amp;M</h1>
<div id="body1602472381090"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_02_0003.html">Overview</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_02_0004.html">Step 1: Log In to DAS</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_02_0005.html">Step 2: Switch to Intelligent O&amp;M</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_02_0000.html">Getting Started</a></div>
</div>
</div>

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<h1 class="topictitle1">Overview</h1>
<div id="body1602474188722"><div class="section" id="das_02_0003__section159564611233"><h4 class="sectiontitle">Scenarios</h4><p id="das_02_0003__p549241782515"></p>
<p id="das_02_0003__p17133173362012">This section describes how to monitor DB instances using Intelligent O&amp;M.</p>
</div>
<div class="section" id="das_02_0003__section491834114289"><h4 class="sectiontitle">Procedure</h4><p id="das_02_0003__p12120114172918">Perform the following operations to monitor databases with Intelligent O&amp;M.</p>
<p id="das_02_0003__p756352113272"><a href="das_02_0004.html">Step 1: Log In to DAS</a></p>
<p id="das_02_0003__p1356412142711"><a href="das_02_0005.html">Step 2: Switch to Intelligent O&amp;M</a></p>
<div class="fignone" id="das_02_0003__fig498610364514"><span class="figcap"><b>Figure 1 </b>Intelligent O&amp;M process</span><br><span><img class="eddx" id="das_02_0003__image1448168174213" src="en-us_image_0000001388191653.png"></span></div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_02_0002.html">Intelligent O&amp;M</a></div>
</div>
</div>

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<h1 class="topictitle1">Step 1: Log In to DAS</h1>
<div id="body1602474188722"><div class="section" id="das_02_0004__section1999419268388"><h4 class="sectiontitle">Procedure</h4><ol id="das_02_0004__ol3408152913530"><li id="das_02_0004__li1087344912452"><span>On the login page, enter the account and password to log in to the DAS console.</span></li><li id="das_02_0004__li16874849154518"><span>Click <span><img id="das_02_0004__image187519493456" src="en-us_image_0000001387911589.png"></span> in the upper left corner and select the required region and project.</span></li><li id="das_02_0004__li19015538311"><span>Click <span><img id="das_02_0004__image96758393138" src="en-us_image_0000001337591616.png"></span> in the upper left corner, and under <strong id="das_02_0004__b2770834102413">Database</strong>, click <strong id="das_02_0004__b1077143472412">Data Admin Service</strong>.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_02_0002.html">Intelligent O&amp;M</a></div>
</div>
</div>

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<h1 class="topictitle1">Step 2: Switch to Intelligent O&amp;M</h1>
<div id="body1602474188722"><div class="section" id="das_02_0005__section6154102194111"><h4 class="sectiontitle">Procedure</h4><ol id="das_02_0005__ol1719683320393"><li id="das_02_0005__li9196833153913"><span>In the navigation pane, choose <strong id="das_02_0005__b11538163620146">Intelligent O&amp;M</strong>, on the <strong id="das_02_0005__b191371652151414">Instance Overview</strong> page, click <strong id="das_02_0005__b1549695113442">Synchronize Instances</strong> and then click <strong id="das_02_0005__b201111194610">Refresh</strong>.</span><p><div class="note" id="das_02_0005__note19190857101712"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="das_02_0005__p1319017577172">Instance synchronization is an asynchronous process, which takes several minutes.</p>
</div></div>
</p></li><li id="das_02_0005__li1348642954119"><span>Locate the instance you want to view and click <strong id="das_02_0005__b176910196165">Details</strong>.</span><p><div class="note" id="das_02_0005__note14254182016347"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="das_02_0005__p10254192015341">This section uses SQL Explorer as an example. For details about how to use each metric, see "Intelligent O&amp;M for RDS for MySQL".</p>
</div></div>
</p></li><li id="das_02_0005__li2919192914610"><span>On the displayed page, choose <strong id="das_02_0005__b737515113192">SQL</strong> &gt; <strong id="das_02_0005__b10869125819184">SQL Explorer</strong>.</span><p><div class="note" id="das_02_0005__note11118105511572"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="das_02_0005__ul13168191365915"><li id="das_02_0005__li1116891345915"><strong id="das_02_0005__b1356233731915">Enable DAS SQL Explorer</strong> must be enabled so that the system can collect and analyze full SQL statements.</li><li id="das_02_0005__li516811316598">With <strong id="das_02_0005__b19987522155820">Enable DAS SQL Explorer</strong> enabled, the instance performance loss is within 5%.</li></ul>
</div></div>
</p></li><li id="das_02_0005__li1314216592544"><span>Click the <strong id="das_02_0005__b11766743152415">SQL Statements</strong> tab.</span><p><div class="note" id="das_02_0005__note737441217569"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="das_02_0005__ul1871413327313"><li id="das_02_0005__li2071412321935">A maximum of 10,000 data records can be displayed on the <strong id="das_02_0005__b114114140309">SQL Statements</strong> tab page. To view more records, export the records for view. Columns such as execution duration, elapsed time, scanned rows, and lock wait are also provided. Additionally, SQL statements can be searched by multiple dimensions, including keyword, time range, and number of updated rows.</li><li id="das_02_0005__li9874181592418">To view more records, click <span class="uicontrol" id="das_02_0005__uicontrol1188313151244"><b>Export</b></span> to create an export task. Click <strong id="das_02_0005__b139974308268">Export History</strong> to check whether the export task succeeded.</li><li id="das_02_0005__li5715332230">After the export succeeded, download the file and view the records on the local PC.</li></ul>
</div></div>
</p></li><li id="das_02_0005__li9434827195116"><span>Click the <strong id="das_02_0005__b18704154913346">SQL Templates</strong> tab.</span><p><div class="note" id="das_02_0005__note61410471474"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="das_02_0005__ul192156265912"><li id="das_02_0005__li132151326699">By default, the SQL statement executions in the last 1 hour are displayed. You can also specify a time range as needed. Columns such as average duration, total duration, total executions, and average scanned rows are provided.</li></ul>
</div></div>
</p></li><li id="das_02_0005__li11216122615911"><span>Click <strong id="das_02_0005__b18206192217396">Details</strong> in the <strong id="das_02_0005__b72213326396">Operation</strong> column to view the SQL template details.</span></li><li id="das_02_0005__li0105135421314"><span>Click the <strong id="das_02_0005__b10457133718489">SQL Statement Types</strong> tab.</span></li><li id="das_02_0005__li1852411285159"><span>Click <strong id="das_02_0005__b1529318258314">Details</strong> in the <strong id="das_02_0005__b12934255318">Operation</strong> column to view SQL details.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_02_0002.html">Intelligent O&amp;M</a></div>
</div>
</div>

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<h1 class="topictitle1">Data Management</h1>
<div id="body1602472381091"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_02_0007.html">Overview</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_02_0011.html">Step 1: Log In to DAS</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_02_0012.html">Step 2: Add Database Login Information</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_02_0008.html">Step 3: Log In to a Database</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_02_0009.html">Step 4: Manage Data</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_02_0000.html">Getting Started</a></div>
</div>
</div>

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<h1 class="topictitle1">Overview</h1>
<div id="body1602474188722"><div class="section" id="das_02_0007__section159564611233"><h4 class="sectiontitle">Scenarios</h4><p id="das_02_0007__p17133173362012">This section describes how to manage data on the <strong id="das_02_0007__b03804733820">Database Management</strong> page.</p>
</div>
<div class="section" id="das_02_0007__section491834114289"><h4 class="sectiontitle">Procedure</h4><p id="das_02_0007__p12120114172918">Perform the following operations to manage data on the <strong id="das_02_0007__b16113645163716">Database Management</strong> page:</p>
<p id="das_02_0007__p15689163012278"><a href="das_02_0011.html">Step 1: Log In to DAS</a></p>
<p id="das_02_0007__p17689133092713"><a href="das_02_0012.html">Step 2: Add Database Login Information</a></p>
<p id="das_02_0007__p36901030152720"><a href="das_02_0008.html">Step 3: Log In to a Database</a></p>
<p id="das_02_0007__p17690133018276"><a href="das_02_0009.html">Step 4: Manage Data</a></p>
<div class="fignone" id="das_02_0007__fig1680514614439"><span class="figcap"><b>Figure 1 </b>Data management operations</span><br><span><img class="eddx" id="das_02_0007__image11130102814463" src="en-us_image_0000001387791961.png"></span></div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_02_0006.html">Data Management</a></div>
</div>
</div>

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<h1 class="topictitle1">Step 3: Log In to a Database</h1>
<div id="body1602474188722"><div class="section" id="das_02_0008__section1229413312270"><h4 class="sectiontitle">Database Management</h4><ol id="das_02_0008__ol14355184634713"><li id="das_02_0008__li15222747195011"><span>In the navigation pane on the left of the DAS console, choose <strong id="das_02_0008__b7155015761">Development Tool</strong> to go to the login list page.</span><p><p id="das_02_0008__p6326144162210"></p>
</p></li><li id="das_02_0008__li1713110213493"><span>Choose <strong id="das_02_0008__b11891122191317">RDS DB instances</strong> and <strong id="das_02_0008__b7896102191311">MySQL</strong> from the drop-down lists in the upper right corner.</span></li><li id="das_02_0008__li1850055811483"><span>Locate the MySQL DB instance you want to log in to and click <strong id="das_02_0008__b11542161853013">Log In</strong> in the <strong id="das_02_0008__b13547161818307">Operation</strong> column.</span></li><li id="das_02_0008__li1938110561728"><span>On the top menu bar, click <strong id="das_02_0008__b167474266325">Database Management</strong> and click <strong id="das_02_0008__b18879271338">Change</strong> to select a database you want to operate.</span></li><li id="das_02_0008__li44302073518"><span>Click the <strong id="das_02_0008__b622112413351">Objects</strong> tab to view objects such as tables, views, stored procedures, events, triggers, and functions.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_02_0006.html">Data Management</a></div>
</div>
</div>

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<h1 class="topictitle1">Step 4: Manage Data</h1>
<div id="body1602474188722"><div class="section" id="das_02_0009__section5590424132518"><h4 class="sectiontitle">Table Management</h4><ol id="das_02_0009__ol1220671614257"><li id="das_02_0009__li86021233181516"><span>On the <strong id="das_02_0009__b1055521632918">Objects</strong> tab page, choose <strong id="das_02_0009__b7379113102912">Tables</strong>. Click <span class="uicontrol" id="das_02_0009__uicontrol3603113313156"><b>Create Table</b></span>. On the displayed page, enter a table name, select the storage engine, character set, and collation, enter the comment, and set advanced settings.</span></li><li id="das_02_0009__li764690131119"><span>Ensure the settings are correct and click <strong id="das_02_0009__b944192243814">Next</strong>. Then add table columns.</span></li><li id="das_02_0009__li5800181510167"><span>Click <strong id="das_02_0009__b15183141283514">Next</strong> and add virtual columns, indexes, and foreign keys.</span></li><li id="das_02_0009__li927052714258"><span>Click <strong id="das_02_0009__b895220193717">Create</strong>. In the <strong id="das_02_0009__b33203354373">SQL Preview</strong> dialog box, click <strong id="das_02_0009__b16985183753811">Back</strong> if there is any incorrect configuration, and click <strong id="das_02_0009__b1293572753819">Execute</strong> to create the table if all configurations are correct.</span></li></ol>
</div>
<div class="section" id="das_02_0009__section1837319203711"><h4 class="sectiontitle">View Management</h4><ol id="das_02_0009__ol6418435103714"><li id="das_02_0009__li16418635133713"><span>On the <strong id="das_02_0009__b12833122244013">Objects</strong> tab page, choose <strong id="das_02_0009__b1251110183404">Views</strong>. Click <span class="uicontrol" id="das_02_0009__uicontrol8418183593710"><b>Create View</b></span>. On the displayed page, enter a view name, select the security, check option, and algorithm, and set the definer and view definition statement.</span></li><li id="das_02_0009__li9419103593715"><span>Click <strong id="das_02_0009__b3719846104114">Create</strong>. On the <strong id="das_02_0009__b20724204614112">Confirm View Definition Script</strong> page, click <strong id="das_02_0009__b10725184610415">Back</strong> if there is something wrong, and click <strong id="das_02_0009__b107261546114116">Execute</strong> to create the view if everything is correct.</span></li></ol>
</div>
<div class="section" id="das_02_0009__section77951414425"><h4 class="sectiontitle">Stored Procedure Management</h4><ol id="das_02_0009__ol45813559422"><li id="das_02_0009__li20581855104218"><span>On the <strong id="das_02_0009__b249911561442">Objects</strong> tab page, choose <strong id="das_02_0009__b6558152124518">Stored Procedures</strong>. Click <strong id="das_02_0009__b1586714143468">Create Stored Procedure</strong>. On the displayed page, specify the name and description.</span></li><li id="das_02_0009__li2674658155016"><span>Ensure the settings are correct and click <strong id="das_02_0009__b125112124716">OK</strong>. The SQL preview page is displayed.</span></li><li id="das_02_0009__li544910114516"><span>Click <strong id="das_02_0009__b23061850184011">Option</strong> and configure the SQL security, determinacy, and data access.</span></li><li id="das_02_0009__li17032541916"><span>Ensure the settings are correct, and click <strong id="das_02_0009__b12963164618397">OK</strong> and then <strong id="das_02_0009__b18963184611394">Save</strong>. If you want to modify the SQL statement, click <strong id="das_02_0009__b154483785518">Cancel</strong> to go back to the SQL preview window.</span></li><li id="das_02_0009__li558214550428"><span>Click <strong id="das_02_0009__b5241840154117">Execute</strong> to create a stored procedure.</span></li></ol>
</div>
<div class="section" id="das_02_0009__section46139135515"><h4 class="sectiontitle">Event Management</h4><ol id="das_02_0009__ol397820135510"><li id="das_02_0009__li297142011556"><span>On the <strong id="das_02_0009__b18637155716180">Objects</strong> tab page, choose <strong id="das_02_0009__b43291152181814">Events</strong>. Click <strong id="das_02_0009__b147801162204">Create Event</strong>. On the displayed page, enter an event name, set the status and execution time, and enter the comment and event definition statements.</span></li><li id="das_02_0009__li20391534195918"><span>Click <strong id="das_02_0009__b15178192122414">Create</strong>. On the <strong id="das_02_0009__b191799262416">Confirm View Definition Script</strong> page, click <strong id="das_02_0009__b15180162112415">Back</strong> if there is something wrong, and click <strong id="das_02_0009__b3180102142420">Execute</strong> to create the event if everything is correct.</span></li></ol>
</div>
<div class="section" id="das_02_0009__section18403148636"><h4 class="sectiontitle">Trigger Management</h4><ol id="das_02_0009__ol1739127639"><li id="das_02_0009__li274019271635"><span>On the <strong id="das_02_0009__b734674814230">Objects</strong> tab page, choose <strong id="das_02_0009__b2039705010236">Triggers</strong>. Click <strong id="das_02_0009__b139361637144411">Create Trigger</strong>. On the displayed page, enter a trigger name, select the trigger table, trigger condition, and trigger event, and enter the trigger definition statement.</span></li><li id="das_02_0009__li1574111279310"><span>Click <strong id="das_02_0009__b2501151182414">Create</strong>. On the <strong id="das_02_0009__b9591451122412">Confirm View Definition Script</strong> page, click <strong id="das_02_0009__b05965118246">Back</strong> if there is something wrong, and click <strong id="das_02_0009__b1559251172413">Execute</strong> to create the trigger if everything is correct.</span></li></ol>
</div>
<div class="section" id="das_02_0009__section18867144318617"><h4 class="sectiontitle">Function Management</h4><ol id="das_02_0009__ol1311812417713"><li id="das_02_0009__li3118144576"><span>On the <strong id="das_02_0009__b11345309294">Objects</strong> tab page, choose <strong id="das_02_0009__b1054324111295">Functions</strong>. Click <strong id="das_02_0009__b113272093014">Create Function</strong>. On the displayed page, enter a function name and set the returned value type and description.</span></li><li id="das_02_0009__li91191244710"><span>Ensure the settings are correct and click <strong id="das_02_0009__b17671118143013">OK</strong>. The SQL preview page is displayed.</span></li><li id="das_02_0009__li171191642074"><span>Click <strong id="das_02_0009__b1776113719300">Option</strong> and configure the SQL security, determinacy, and data access.</span></li><li id="das_02_0009__li11191641072"><span>Ensure the settings are correct, and click <strong id="das_02_0009__b44451659103017">OK</strong> and then <strong id="das_02_0009__b1045015919301">Save</strong>. If you want to modify the SQL statements, click <strong id="das_02_0009__b453583561">Cancel</strong> to go back to the SQL preview window. Then click <strong id="das_02_0009__b6692191133120">Execute</strong> to create the function.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_02_0006.html">Data Management</a></div>
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<h1 class="topictitle1">Step 1: Log In to DAS</h1>
<div id="body1603779629289"><div class="section" id="das_02_0011__section1999419268388"><h4 class="sectiontitle">Procedure</h4><ol id="das_02_0011__ol3408152913530"><li id="das_02_0011__li1087344912452"><span>On the login page, enter the account and password to log in to the management console.</span></li><li id="das_02_0011__li16874849154518"><span>Click <span><img id="das_02_0011__image187519493456" src="en-us_image_0000001337591560.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="das_02_0011__li19015538311"><span>Click <span><img id="das_02_0011__image96758393138" src="en-us_image_0000001387911537.png"></span> in the upper left corner, and under <strong id="das_02_0011__b148490213435">Database</strong>, click <strong id="das_02_0011__b38506210437">Data Admin Service</strong>.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_02_0006.html">Data Management</a></div>
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<h1 class="topictitle1">Step 2: Add Database Login Information</h1>
<div id="body1603779629289"><div class="section" id="das_02_0012__section2487181111813"><h4 class="sectiontitle">Scenarios</h4><ul id="das_02_0012__ul6297154154019"><li id="das_02_0012__li202972484014">With DAS, you can create logins to manage databases using a GUI.</li><li id="das_02_0012__li172981416400">This section uses an RDS DB instance as an example to describe how to add a database login. </li></ul>
</div>
<div class="section" id="das_02_0012__section2097285612378"><h4 class="sectiontitle">Adding RDS DB Instance Login Information</h4><ol id="das_02_0012__ol16873134914510"><li id="das_02_0012__li484342497"><span>In the navigation pane on the left of the DAS console, choose <strong id="das_02_0012__b951315325513">Development Tool</strong> to go to the login list page.</span></li><li id="das_02_0012__li98699232543"><span>Click <strong id="das_02_0012__b786231019564">Add Login</strong>.</span></li><li id="das_02_0012__li946121155013"><span>On the displayed page, select the DB engine, source database, and target DB instance, enter the login username, password, and description (optional), and enable <strong id="das_02_0012__b12581820135816">Collect Metadata Periodically</strong> and <strong id="das_02_0012__b205922013589">Show Executed SQL Statements</strong>.</span></li><li id="das_02_0012__li13134125011116"><span><span id="das_02_0012__text33391405129">Test the connection as needed. If a message indicating that the connection failed is displayed, modify the connection according to the failure causes contained in the message.</span></span><p><div class="note" id="das_02_0012__note313413504115"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="das_02_0012__ul13134135017110"><li id="das_02_0012__li613410506116">The username and password required for adding the login are the database username and password.</li><li id="das_02_0012__li813413505117">To delete a password, you can modify or delete the login information.</li><li id="das_02_0012__li11566145183915">You are advised to enable <strong id="das_02_0012__b1661216232214">Collect Metadata Periodically</strong>. If it is disabled, DAS obtains only the structured data from databases in real time, and the performance of databases is affected.<p id="das_02_0012__p1289111154196">The collection time cannot be customized. Once <strong id="das_02_0012__b108451391237">Collect Metadata Periodically</strong> is enabled, DAS automatically collects metadata at 20:00 every day (UTC time). If you are not using a UTC time, convert the time according to your local time zone. You can also click <strong id="das_02_0012__b2741937519">Collect Now</strong> to collect metadata at any time you want.</p>
</li><li id="das_02_0012__li79919406266">You are advised to enable <strong id="das_02_0012__b893114623215">Show Executed SQL Statements</strong>. With it enabled, you can view the executed SQL statements under <strong id="das_02_0012__b2936136183217">SQL Operations</strong> &gt; <strong id="das_02_0012__b1693676133214">SQL History</strong> and execute them again without entering the SQL statements.</li></ul>
</div></div>
</p></li><li id="das_02_0012__li77831545112"><span>Click <span class="uicontrol" id="das_02_0012__uicontrol71012983212"><b>OK</b></span>.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_02_0006.html">Data Management</a></div>
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<h1 class="topictitle1">Adding Login Information</h1>
<div id="body1525999517192"><div class="section" id="das_03_0002__section2487181111813"><h4 class="sectiontitle">Scenarios</h4><p id="das_03_0002__p1623722592714">This section describes how to add database login information so that you can log in to a database for visualized data management operations.</p>
<div class="note" id="das_03_0002__note897103573915"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="das_03_0002__ul1241511161931"><li id="das_03_0002__li10287143903917">If you have not logged in to a DB instance through the created login over a year, the system automatically clears all information, including the saved password, of this login.</li><li id="das_03_0002__li1787554812417">You can log in to the same database either on the DAS console or using other clients. Both methods do not affect each other.</li><li id="das_03_0002__li19151956161514">DAS allows you to manage DB instances of different types of engines. An RDS MySQL DB instance is used in the following example.</li></ul>
</div></div>
</div>
<div class="section" id="das_03_0002__section11731353152813"><h4 class="sectiontitle">Adding Login Information for RDS DB Instances</h4><ol id="das_03_0002__ol16873134914510"><li id="das_03_0002__li484342497"><span>In the navigation pane on the left of the DAS console, choose <strong id="das_03_0002__b5487103211012">Development Tool</strong> to go to the login list page.</span></li><li id="das_03_0002__li98699232543"><span>Click <strong id="das_03_0002__b71212467911">Add Login</strong>.</span></li><li id="das_03_0002__li946121155013"><span>On the displayed page, select the DB engine, source database, and target DB instance, enter the login username, password, and description (optional), and enable <strong id="das_03_0002__b360715334174">Collect Metadata Periodically</strong> and <strong id="das_03_0002__b1160833314178">Show Executed SQL Statements</strong>.</span><p><div class="note" id="das_03_0002__note313413504115"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="das_03_0002__ul13134135017110"><li id="das_03_0002__li1761919371228">After you specify <strong id="das_03_0002__b7392152514397">Source Database</strong>, the system automatically lists all the DB instances from this source under the current account.</li><li id="das_03_0002__li613410506116">The username and password required for adding the login are the database username and password.</li><li id="das_03_0002__li813413505117">To delete the password, you can modify or delete the login.</li><li id="das_03_0002__li11566145183915">You are advised to enable <strong id="das_03_0002__b954365119139">Collect Metadata Periodically</strong>. If it is disabled, DAS obtains only the structured data from databases in real time, and the performance of databases is affected.<p id="das_03_0002__p1289111154196">The collection time cannot be customized. Once <strong id="das_03_0002__b71451153142">Collect Metadata Periodically</strong> is enabled, DAS automatically collects metadata at 20:00 every day (UTC time). If you are not using a UTC time, convert the time according to your local time zone. You can also click <strong id="das_03_0002__b15429176143">Collect Now</strong> to collect metadata at any time you want.</p>
</li><li id="das_03_0002__li79919406266">You are advised to enable <strong id="das_03_0002__b359517447408">Show Executed SQL Statements</strong>. With it enabled, you can view the executed SQL statements under <strong id="das_03_0002__b20602144416401">SQL Operations</strong> &gt; <strong id="das_03_0002__b760364424012">SQL History</strong> and execute them again without entering the SQL statements.</li></ul>
</div></div>
</p></li><li id="das_03_0002__li46621214195511"><span><span id="das_03_0002__text7697920185515">Test the connection as needed. If a message indicating that the connection failed is displayed, modify the connection according to the failure causes contained in the message.</span></span></li><li id="das_03_0002__li77831545112"><span>Click <span class="uicontrol" id="das_03_0002__uicontrol977564864018"><b>OK</b></span>.</span></li></ol>
</div>
</div>
<div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="das_20_0011.html">User Guide</a></div>
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<h1 class="topictitle1">Logging In to a Database</h1>
<div id="body1526004532266"><div class="section" id="das_03_0003__section2487181111813"><h4 class="sectiontitle">Scenarios</h4><p id="das_03_0003__p45111263111821">On the DAS console, log in to a DB instance for database operations and management.</p>
</div>
<div class="section" id="das_03_0003__section021811112114"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0003__ol04911352237"><li id="das_03_0003__li159645042310"><span>Log in to the DAS console.</span></li><li id="das_03_0003__li114913357231"><span>In the login list of Development Tool, locate the DB instance you want to log in to and click <strong id="das_03_0003__b1795565016161">Log In</strong> in the <strong id="das_03_0003__b18861125817161">Operation</strong> column.</span><p><p id="das_03_0003__p36756381408">Select an instance type to display your desired DB instances. RDS DB instances are used as an example.</p>
<div class="fignone" id="das_03_0003__fig1361716211199"><span class="figcap"><b>Figure 1 </b>Database login list</span><br><span><img id="das_03_0003__image1861716217196" src="en-us_image_0000001337591416.png"></span></div>
</p></li></ol>
</div>
</div>
<div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="das_20_0011.html">User Guide</a></div>
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<h1 class="topictitle1">Modifying Login Information</h1>
<div id="body1526002940529"><div class="section" id="das_03_0004__section60461353162212"><h4 class="sectiontitle">Scenarios</h4><p id="das_03_0004__p27667840173352">DAS allows you to modify login information, such as username and password. You can also choose whether to remember password, or enable or disable periodic metadata collection.</p>
</div>
<div class="section" id="das_03_0004__section11731353152813"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0004__ol1434086115118"><li id="das_03_0004__li17480165933819"><span>In the login list of Development Tool, locate the DB instance for which you want to modify its login information and click <strong id="das_03_0004__b17468191311911">Modify</strong> in the <strong id="das_03_0004__b7468213699">Operation</strong> column.</span><p><div class="fignone" id="das_03_0004__fig760843072013"><span class="figcap"><b>Figure 1 </b>Login list of Development Tool</span><br><span><img id="das_03_0004__image760963013202" src="en-us_image_0000001387791885.png"></span></div>
</p></li><li id="das_03_0004__li9989140195313"><span>On the displayed page, modify the information as required.</span><p><ul id="das_03_0004__u7f0ab1d062cf4deda9901b2a34ee1165"><li id="das_03_0004__l62408c04b5454b97b0609d4c3741f87c">If you do not want to modify the information, click <strong id="das_03_0004__b842352706143619">Cancel</strong>.</li><li id="das_03_0004__li17194133318589">If you want to modify the information, make the modifications, confirm the settings, and click <strong id="das_03_0004__b842352706143733">OK</strong>.<div class="fignone" id="das_03_0004__fig18712185019228"><span class="figcap"><b>Figure 2 </b>Modify Login Information</span><br><span><img id="das_03_0004__image20713185032212" src="en-us_image_0000001337751452.png"></span></div>
</li></ul>
</p></li></ol>
</div>
</div>
<div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="das_20_0011.html">User Guide</a></div>
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<h1 class="topictitle1">Deleting Login Information</h1>
<div id="body1526002940529"><div class="section" id="das_03_0005__section2487181111813"><h4 class="sectiontitle">Scenarios</h4><p id="das_03_0005__p157691383710">Delete the login information you no longer need.</p>
</div>
<div class="notice" id="das_03_0005__note66377071111037"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="das_03_0005__p10249075175439">A login represents an entry for managing databases. Deleted logins have no impact on your database performance but cannot be recovered, exercise caution when you perform this operation.</p>
</div></div>
<div class="section" id="das_03_0005__section11731353152813"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0005__ol1434086115118"><li id="das_03_0005__li1083559195118"><span>In the login list of Development Tool, locate the DB instance for which you want to delete its login information and click <strong id="das_03_0005__b84933127282">Delete</strong> in the <strong id="das_03_0005__b14493712192819">Operation</strong> column.</span></li><li id="das_03_0005__li9989140195313"><span>In the displayed dialog box, click <strong id="das_03_0005__b18500132042618">Yes</strong>.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_20_0011.html">User Guide</a></div>
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<h1 class="topictitle1">Logging In to the DAS Console</h1>
<div id="body1531905064048"><div class="section" id="das_03_0007__section105856811430"><h4 class="sectiontitle">Logging In to Console</h4><ol id="das_03_0007__ol3408152913530"><li id="das_03_0007__li1087344912452"><span>On the login page, enter the account and password to log in to the management console.</span></li><li id="das_03_0007__li16874849154518"><span>Click <span><img id="das_03_0007__image187519493456" src="en-us_image_0000001337431664.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="das_03_0007__li19015538311"><span>Click <span><img id="das_03_0007__image96758393138" src="en-us_image_0000001337751544.png"></span> in the upper left corner, and under <strong id="das_03_0007__b96189381396">Database</strong>, click <strong id="das_03_0007__b46208381913">Data Admin Service</strong>.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_20_0011.html">User Guide</a></div>
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<h1 class="topictitle1">Real-Time Sessions</h1>
<div id="body1578900108182"><div class="section" id="das_03_0011__section1582324314564"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0011__ol93493469568"><li id="das_03_0011__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0011__li2145113319114"><span>On the <strong id="das_03_0011__b186011111131">Overview</strong> page, click <strong id="das_03_0011__b1609151115138">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0011__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0011__b346091315132">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0011__li10349946195620"><span>Choose <strong id="das_03_0011__b1178011413293">Sessions</strong> &gt; <strong id="das_03_0011__b916615117297">Real-Time Sessions</strong> to view the real-time session statistics collected by user, host, and database.</span></li><li id="das_03_0011__li27051232115"><span>On the <strong id="das_03_0011__b7509172520333">All Sessions</strong> tab page, select the abnormal sessions you want to end and click <span class="uicontrol" id="das_03_0011__uicontrol251013253334"><b>Kill</b></span> for the databases to recover.</span><p><p id="das_03_0011__p746345142113">On the <strong id="das_03_0011__b118311174713">Slow Sessions</strong> tab page, set the slow session threshold and click the refreshing button or enable <strong id="das_03_0011__b484717473">Auto Refresh</strong> to filter out the SQL statements whose execution time exceeds the threshold. Select the sessions you want to end and click <strong id="das_03_0011__b14785105918554">Kill</strong> for the databases to recover.</p>
</p></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0027.html">Sessions</a></div>
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<a name="das_03_0015"></a><a name="das_03_0015"></a>
<h1 class="topictitle1">SQL Explorer</h1>
<div id="body1579244421502"><div class="section" id="das_03_0015__section194230161415"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0015__ol181115339416"><li id="das_03_0015__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0015__li2145113319114"><span>On the <strong id="das_03_0015__b244014461317">Overview</strong> page, click <strong id="das_03_0015__b744114413133">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0015__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0015__b04296465137">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0015__li581367183111"><span>On the <strong id="das_03_0015__b7161153216499">SQL</strong> tab page, click <strong id="das_03_0015__b12363171865010">SQL Explorer</strong> to view the full SQL details of the current instance.</span></li><li id="das_03_0015__li14457326113"><span>On the <strong id="das_03_0015__b18317422429">SQL Statements</strong> tab page, click <strong id="das_03_0015__b03171629425">Enable DAS SQL Explorer</strong>. Query the SQL statements executed by the current instance by different criteria, including time range, user, keyword, and database.</span><p><div class="note" id="das_03_0015__note1784101515111"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="das_03_0015__ul6370162654911"><li id="das_03_0015__li13701426104912">Click <strong id="das_03_0015__b19868181615">Export</strong> to export SQL statement information. A maximum of 100,000 records can be exported.</li><li id="das_03_0015__li15370926114913">Click <strong id="das_03_0015__b103504201822">Export History</strong> to view the exported SQL statements.</li></ul>
</div></div>
</p></li><li id="das_03_0015__li999619882216"><span>On the <strong id="das_03_0015__b1483981510366">SQL Templates</strong> tab page, select a time range as required to view SQL templates and their statistical information, such as the average execution duration.</span></li><li id="das_03_0015__li11294155811106"><span>On the <strong id="das_03_0015__b129391036171711">SQL Statement Types</strong> tab page, view types of SQL statements that were ever executed.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0028.html">SQL</a></div>
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<h1 class="topictitle1">Emergency Channel</h1>
<div id="body1579244421502"><div class="section" id="das_03_0016__section158691750154012"><h4 class="sectiontitle">Scenarios</h4><ul id="das_03_0016__ul95412126414"><li id="das_03_0016__li75421712104118">Emergency Channel<ul id="das_03_0016__ul145281224191817"><li id="das_03_0016__li1528202471810">If the maximum number of sessions for an instance has been reached and the instance cannot be logged in to, you can view and kill unnecessary sessions through the emergency channel.</li><li id="das_03_0016__li1529182431811">Emergency channel is available to only RDS MySQL and GaussDB(for MySQL) DB databases currently, but not to self-built databases on ECSs and instances in the creating, frozen, or abnormal state.</li><li id="das_03_0016__li952932441816">Use this function in urgent conditions. All your kill operations will be recorded in logs.</li><li id="das_03_0016__li1852932431813">If your instance can be logged in to on the DAS console, log in to the instance and perform desired operations through <strong id="das_03_0016__b4698131720251">Real-Time Sessions</strong>.</li><li id="das_03_0016__li9529152416189">Sessions of sensitive users, like rdsadmin, rdsbackup, rdsmetric, and rdsRepl cannot be killed.</li></ul>
</li><li id="das_03_0016__li163981515184116">History Logs<p id="das_03_0016__p7667172444419"><a name="das_03_0016__li163981515184116"></a><a name="li163981515184116"></a>On the <strong id="das_03_0016__b197664371061">History Logs</strong> tab page, you can view all your sessions killed through the emergency channel.</p>
</li></ul>
</div>
<div class="section" id="das_03_0016__section145368305513"><h4 class="sectiontitle">Prerequisites</h4><p id="das_03_0016__p640314181489">The DB engine must be MySQL. The MySQL 5.6 version must be 5.6.43.3 or later, and MySQL 5.7 version must be 5.7.25.3 or later.</p>
</div>
<div class="section" id="das_03_0016__section16707254123620"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0016__ol181115339416"><li id="das_03_0016__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0016__li2145113319114"><span>On the <strong id="das_03_0016__b838842511310">Overview</strong> page, click <strong id="das_03_0016__b039832517133">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0016__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0016__b3512122751311">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0016__li1779617209276"><span>On the <strong id="das_03_0016__b8589128141512">Emergency Channel</strong> tab page, select the sessions you want to kill. By default, the sessions are sorted in descending order by session duration.</span></li><li id="das_03_0016__li5930134811590"><span>Click <strong id="das_03_0016__b1956143022112">Kill</strong>. In the displayed dialog box, click <span class="uicontrol" id="das_03_0016__uicontrol172702221292"><b>Yes</b></span>.</span></li><li id="das_03_0016__li650192913916"><span>On the <span class="uicontrol" id="das_03_0016__uicontrol42201311614"><b>History Logs</b></span> tab page, view your sessions killed through the emergency channel.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0027.html">Sessions</a></div>
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<h1 class="topictitle1">Slow Query Logs</h1>
<div id="body1581490966198"><div class="section" id="das_03_0017__section1479062101110"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0017__ol181115339416"><li id="das_03_0017__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0017__li2145113319114"><span>On the <strong id="das_03_0017__b5613103441312">Overview</strong> page, click <strong id="das_03_0017__b162273418131">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0017__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0017__b187141336141318">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0017__li581367183111"><span>On the <strong id="das_03_0017__b1564174061015">SQL</strong> tab page, click <strong id="das_03_0017__b311593111114">Slow Query Logs</strong> to view the slow SQL trend of the current instance.</span></li><li id="das_03_0017__li1330410173545"><span>Set your desired time range or select <strong id="das_03_0017__b4275103415135">Last 1 hour</strong>, <strong id="das_03_0017__b5109101170">Last 6 hours</strong>, or <strong id="das_03_0017__b3719115661616">Last 1 day</strong> to view the corresponding slow query logs, CPU usage, and archived slow query logs.</span></li><li id="das_03_0017__li1276813215449"><span>Click <span class="uicontrol" id="das_03_0017__uicontrol1099491544316"><b>Enable DAS Slow Query Log</b></span>. In the displayed dialog box, read and agree to the security agreement, and click <span class="uicontrol" id="das_03_0017__uicontrol3999515114318"><b>OK</b></span>.</span></li><li id="das_03_0017__li1630518911201"><span>On the lower part of the <strong id="das_03_0017__b19342111933218">Log Trends</strong> tab page, view the statistics and details of slow query logs.</span><p><ul id="das_03_0017__ul12453101415258"><li id="das_03_0017__li19355165842518">Query and view slow query logs by database name.</li><li id="das_03_0017__li64535148251">Click <span class="uicontrol" id="das_03_0017__uicontrol1272333017267"><b>Export Slow Query Log</b></span> to export the slow query logs.</li><li id="das_03_0017__li16453114172519">Click <span class="uicontrol" id="das_03_0017__uicontrol532352022415"><b>Export History</b></span> to view the export history of slow query logs.</li></ul>
</p></li><li id="das_03_0017__li3832151854219"><span>On the <strong id="das_03_0017__b6243175918315">Log Archiving</strong> tab page, obtain the slow query log files of the current DB instance in either of the following ways: (The archiving function saves slow query log files generated in the last 10 days.)</span><p><ul id="das_03_0017__ul1721920175810"><li id="das_03_0017__li77262010588">Click <strong id="das_03_0017__b1873183055717">Generate Latest Log File</strong>.</li><li id="das_03_0017__li388711101212">DAS automatically generates a slow query log every time the log data reaches 50 MB.</li></ul>
</p></li><li id="das_03_0017__li2416118517"><span>In the slow query log list, click <span class="uicontrol" id="das_03_0017__uicontrol106099471256"><b>Download</b></span> to download and view log data.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0028.html">SQL</a></div>
</div>
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<h1 class="topictitle1">Function Overview</h1>
<div id="body1599016159118"><div class="section" id="das_03_0025__section1952710375112"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0025__ol115581422111117"><li id="das_03_0025__li12558182271112"><span>On the DAS console, choose <span class="uicontrol" id="das_03_0025__uicontrol924917202122"><b>Intelligent O&amp;M</b></span> to go to the instance overview page of Intelligent O&amp;M.</span></li><li id="das_03_0025__li17554141581215"><span>In the <strong id="das_03_0025__b117431648202015">Instance Overview</strong> area, click <strong id="das_03_0025__b1331861419217">Set Displayed Metrics</strong> to specify the performance metrics to display.</span></li><li id="das_03_0025__li7103848103018"><span>After specifying the metrics, click <strong id="das_03_0025__b97022820125">OK</strong>.</span></li><li id="das_03_0025__li16698164822317"><span>Click <strong id="das_03_0025__b156790121181">Details</strong> of an instance to go to the Intelligent O&amp;M details page.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_04_0096.html">MySQL DB Instances</a></div>
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<h1 class="topictitle1">Performance</h1>
<div id="body1599030201258"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_03_0034.html">Real-Time Diagnosis</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_03_0035.html">Real-Time Performance</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_03_0036.html">Performance History</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_03_0037.html">Performance Trends Comparisons</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_03_0038.html">Custom Graphs</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_04_0096.html">MySQL DB Instances</a></div>
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<h1 class="topictitle1">Sessions</h1>
<div id="body1599030201258"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_03_0011.html">Real-Time Sessions</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_03_0016.html">Emergency Channel</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_04_0096.html">MySQL DB Instances</a></div>
</div>
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<h1 class="topictitle1">SQL</h1>
<div id="body1599030201258"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_03_0017.html">Slow Query Logs</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_03_0015.html">SQL Explorer</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0100.html">SQL Diagnosis</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_04_0096.html">MySQL DB Instances</a></div>
</div>
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<h1 class="topictitle1">Space</h1>
<div id="body1599030201258"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_03_0039.html">Instance Space</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_03_0040.html">Database Space</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_04_0096.html">MySQL DB Instances</a></div>
</div>
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<h1 class="topictitle1">Binlog</h1>
<div id="body1599030201258"><div class="note" id="das_03_0030__note15314132134120"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="das_03_0030__p144620612510">GaussDB(for MySQL) DB instances are currently not supported.</p>
</div></div>
<div class="section" id="das_03_0030__section8332163932915"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0030__ol1314114919495"><li id="das_03_0030__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0030__li2145113319114"><span>On the <strong id="das_03_0030__b7223154314149">Overview</strong> page, click <strong id="das_03_0030__b723284313147">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0030__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0030__b25659451146">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0030__li82054792914"><span>On the <strong id="das_03_0030__b32571746204014">binlog</strong> tab page, click <strong id="das_03_0030__b3154185813405">Latest Logs</strong>. On the displayed page, locate the target file and click <strong id="das_03_0030__b13519130124812">Parse</strong> in the <strong id="das_03_0030__b205201223483">Operation</strong> column to parse the file.</span></li><li id="das_03_0030__li3194512182316"><span>On the <strong id="das_03_0030__b13254258204918">Archived Logs</strong> tab page, select a time range to view log files archived during this period.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_04_0096.html">MySQL DB Instances</a></div>
</div>
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<h1 class="topictitle1">Parameters</h1>
<div id="body1599030201258"><div class="note" id="das_03_0031__note15314132134120"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="das_03_0031__p144620612510">GaussDB(for MySQL) DB instances are currently not supported.</p>
</div></div>
<div class="section" id="das_03_0031__section72051939185412"><h4 class="sectiontitle">Memory Parameter Setting Diagnosis</h4><ol id="das_03_0031__ol1314114919495"><li id="das_03_0031__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0031__li2145113319114"><span>On the <strong id="das_03_0031__b10290251131415">Overview</strong> page, click <strong id="das_03_0031__b12997519143">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0031__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0031__b1725714585148">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0031__li339010195229"><span>Choose <strong id="das_03_0031__b6921139750">Parameters</strong> &gt; <strong id="das_03_0031__b223514133512">Memory Parameter Setting Diagnosis</strong>.</span></li><li id="das_03_0031__li17289921202"><span>On the displayed page, adjust parameter settings to estimate the maximum available memory for MySQL.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_04_0096.html">MySQL DB Instances</a></div>
</div>
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<h1 class="topictitle1">Daily Reports</h1>
<div id="body1599030201258"><div class="section" id="das_03_0032__section16167144964310"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0032__ol1314114919495"><li id="das_03_0032__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0032__li2145113319114"><span>On the <strong id="das_03_0032__b12328192881518">Overview</strong> page, click <strong id="das_03_0032__b5337728181511">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0032__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0032__b2835183031518">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0032__li3149135017264"><span>On the displayed page, choose <strong id="das_03_0032__b528315612116">Daily Reports</strong> &gt; <strong id="das_03_0032__b122931912171318">Diagnosis Overview</strong> and click <strong id="das_03_0032__b21292516134">Diagnose</strong> to diagnose the current instance.</span><p><p id="das_03_0032__p1633115517269">You can also click <strong id="das_03_0032__b43421140131412">View History Report</strong> to view historical diagnosis reports.</p>
</p></li><li id="das_03_0032__li1099915172502"><span>On the <strong id="das_03_0032__b495015592215">Analysis Dimensions</strong> page, view report details.</span></li><li id="das_03_0032__li20688183754912"><span>Click <strong id="das_03_0032__b7629139102116">Specified Analysis</strong> to view the details in a report, including slow SQL analysis, full SQL analysis, SQL type analysis, performance and disk analysis, performance trend graphs, tablespace analysis, and event analysis.</span><p><div class="note" id="das_03_0032__note7518183915503"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="das_03_0032__ul6698195651013"><li id="das_03_0032__li116981656201017">Click <strong id="das_03_0032__b9405121053110">Download</strong> to the upper right corner of the <strong id="das_03_0032__b683514353295">Today's Report</strong> page to download the diagnosis report to your local PC.</li><li id="das_03_0032__li0586115512564">Click <strong id="das_03_0032__b1853594893017">Subscribe</strong> and enter your email to have the diagnosis report emailed to you. Pay attention to the following precautions before subscribing to diagnosis reports:<ul id="das_03_0032__ul151342418589"><li id="das_03_0032__li1968621385817">The subscription function depends on the SMN service.</li><li id="das_03_0032__li14131846919">Diagnosis reports will be emailed to you only after you have subscribed to diagnosis reports and the diagnosis result is abnormal.</li></ul>
</li></ul>
</div></div>
</p></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_04_0096.html">MySQL DB Instances</a></div>
</div>
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<h1 class="topictitle1">Real-Time Diagnosis</h1>
<div id="body1599033852740"><div class="section" id="das_03_0034__section31574113514"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0034__ol11647152514128"><li id="das_03_0034__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0034__li2145113319114"><span>On the <strong id="das_03_0034__b18694417121">Overview</strong> page, click <strong id="das_03_0034__b1887812417126">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0034__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0034__b1186055710302">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0034__li176471925101217"><span>Choose <strong id="das_03_0034__b10813182410311">Performance</strong> &gt; <strong id="das_03_0034__b54151610173216">Real-Time Diagnosis</strong>.</span></li><li id="das_03_0034__li171582891219"><span>On the <strong id="das_03_0034__b821252803916">Real-Time Diagnosis</strong> tab page, view the current resource usages, real-time performance, and slow query logs of the instance.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0026.html">Performance</a></div>
</div>
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<a name="das_03_0035"></a><a name="das_03_0035"></a>
<h1 class="topictitle1">Real-Time Performance</h1>
<div id="body1599033852740"><div class="section" id="das_03_0035__section1994220311514"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0035__ol76771041192310"><li id="das_03_0035__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0035__li2145113319114"><span>On the <strong id="das_03_0035__b762911279123">Overview</strong> page, click <strong id="das_03_0035__b7636192717127">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0035__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0035__b7920133213123">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0035__li237313220277"><span>On the <strong id="das_03_0035__b11412102764411">Real-Time Performance</strong> tab page, view the server uptime, connection information, and buffer pool.</span></li><li id="das_03_0035__li367824119232"><span>Click <strong id="das_03_0035__b13695172055313">Start</strong>/<strong id="das_03_0035__b4941132413531">Pause</strong> or change the time interval (1 to 10 seconds) to adjust the performance monitoring. You can also click <strong id="das_03_0035__b16753132558">Set Metric</strong> to specify required metrics based on service requirements.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0026.html">Performance</a></div>
</div>
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<h1 class="topictitle1">Performance History</h1>
<div id="body1599033852740"><div class="section" id="das_03_0036__section2628165220510"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0036__ol126725712427"><li id="das_03_0036__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0036__li2145113319114"><span>On the <strong id="das_03_0036__b87481938101220">Overview</strong> page, click <strong id="das_03_0036__b107567385122">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0036__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0036__b189619417126">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0036__li10309103144312"><span>Choose <strong id="das_03_0036__b10938114410291">Performance</strong> &gt; <strong id="das_03_0036__b8939344172913">Performance History</strong> to view performance graphs of instance metrics.</span></li><li id="das_03_0036__li79921117317"><span>Click <span class="uicontrol" id="das_03_0036__uicontrol5886152010575"><b>Select Metric</b></span> to specify your desired metrics and click <span class="uicontrol" id="das_03_0036__uicontrol1288782045715"><b>OK</b></span>.</span><p><p id="das_03_0036__p17814310273">Set a time range in the upper right corner so that you can view the DB instance performance during this period. You can also click <strong id="das_03_0036__b1486082917250">Detail</strong> on each metric performance graph to set the time range.</p>
</p></li><li id="das_03_0036__li1779940104015"><span>Enable <span class="uicontrol" id="das_03_0036__uicontrol19500632142515"><b>Interactive Graph</b></span> to view the performance of other metrics at the same time.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0026.html">Performance</a></div>
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<h1 class="topictitle1">Performance Trends Comparisons</h1>
<div id="body1599033852740"><div class="section" id="das_03_0037__section1582324314564"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0037__ol93493469568"><li id="das_03_0037__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0037__li2145113319114"><span>On the <strong id="das_03_0037__b113081747201212">Overview</strong> page, click <strong id="das_03_0037__b93141847121217">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0037__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0037__b1951364931213">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0037__li10349946195620"><span>On the <strong id="das_03_0037__b15215211385">Performance Trends Comparisons</strong> tab page, view the historical performance changes of the current instance at the same time on different days.</span></li><li id="das_03_0037__li203498460569"><span>Click <span class="uicontrol" id="das_03_0037__uicontrol9280149124420"><b>Select Metric</b></span> to specify your desired metrics, and click <span class="uicontrol" id="das_03_0037__uicontrol102812974413"><b>OK</b></span>.</span></li><li id="das_03_0037__li1535014615562"><span>Set the date and time period so that you can view the performance data during this period. Alternatively, click <strong id="das_03_0037__b19535315457">Detail</strong> on each metric performance graph to set the date and time range.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0026.html">Performance</a></div>
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<h1 class="topictitle1">Custom Graphs</h1>
<div id="body1599033852740"><div class="section" id="das_03_0038__section1582324314564"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0038__ol93493469568"><li id="das_03_0038__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0038__li2145113319114"><span>On the <strong id="das_03_0038__b3518556121">Overview</strong> page, click <strong id="das_03_0038__b1812165519126">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0038__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0038__b1082265718127">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0038__li10349946195620"><span>On the <strong id="das_03_0038__b495724015174">Custom Graphs</strong> tab page, customize the metrics you want to view.</span></li><li id="das_03_0038__li203498460569"><span>Click <strong id="das_03_0038__b824675620507">Create Graph</strong>, enter a graph name, select the required metrics, and click <strong id="das_03_0038__b12173152419516">OK</strong> to view performance history in a graph.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0026.html">Performance</a></div>
</div>
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<h1 class="topictitle1">Instance Space</h1>
<div id="body1599037246196"><div class="section" id="das_03_0039__section1582324314564"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0039__ol93493469568"><li id="das_03_0039__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0039__li2145113319114"><span>On the <strong id="das_03_0039__b10943131921418">Overview</strong> page, click <strong id="das_03_0039__b595061941414">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0039__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0039__b7214182241416">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0039__li10349946195620"><span>On the <strong id="das_03_0039__b111965525820">Space</strong> tab page, click <strong id="das_03_0039__b48151742597">Instance Space</strong> to view the space usage and usage trend of the current instance.</span></li><li id="das_03_0039__li1535014615562"><span>View the space usage trend by setting a specific time range.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0029.html">Space</a></div>
</div>
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<h1 class="topictitle1">Database Space</h1>
<div id="body1599037246196"><div class="section" id="das_03_0040__section1479062101110"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0040__ol145983882214"><li id="das_03_0040__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0040__li2145113319114"><span>On the <strong id="das_03_0040__b20163011411">Overview</strong> page, click <strong id="das_03_0040__b111014305141">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0040__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0040__b1427083251416">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0040__li108341492177"><span>On the <strong id="das_03_0040__b1980418056">Space</strong> tab page, select <strong id="das_03_0040__b796412258511">Database Space</strong> to view the space usage and fragmentation rate of a database.</span></li><li id="das_03_0040__li46951150163015"><span>Locate the target database, and click <span class="uicontrol" id="das_03_0040__uicontrol678415141888"><b>Database Space &amp; Metadata Analysis</b></span> in the <strong id="das_03_0040__b578512141088">Operation</strong> column.</span></li><li id="das_03_0040__li193729523916"><span>On the <strong id="das_03_0040__b101304521211">Tables</strong> tab page, locate the target table and click <span class="uicontrol" id="das_03_0040__uicontrol3919101731118"><b>Table Details</b></span> in the <strong id="das_03_0040__b7919141791114">Operation</strong> column to view table details.</span></li><li id="das_03_0040__li1841161613407"><span>Click <strong id="das_03_0040__b1128464191917">Table Space Overview</strong> in the <strong id="das_03_0040__b173445241178">Operation</strong> column o view the table space usage.</span></li><li id="das_03_0040__li15904239354"><span>On the <span class="uicontrol" id="das_03_0040__uicontrol16909102313617"><b>Database Space Overview</b></span> page, view the database space usage trend by specifying a specific time range.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0029.html">Space</a></div>
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<h1 class="topictitle1">Locks and Transactions</h1>
<div id="body0000001071484394"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_03_0042.html">InnoDB Lock Query</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_03_0043.html">Metadata Locks</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_03_0044.html">Historical Transactions</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_04_0096.html">MySQL DB Instances</a></div>
</div>
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<h1 class="topictitle1">InnoDB Lock Query</h1>
<div id="body0000001071298093"><div class="section" id="das_03_0042__section171085203429"><h4 class="sectiontitle">Overview</h4><div class="p" id="das_03_0042__p1282619442714">With this function, the system displays the lock waits generated before the DML operations on the database in real time. With these waits, you can quickly locate the session waits and blocks that happened when multiple sessions update the same piece of data at the same time, and can quickly terminate the source session that holds locks to restore blocked operations.<div class="note" id="das_03_0042__note15314132134120"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="das_03_0042__p1665174918266">This feature does not support DDL locks. You view and analyze them on the <strong id="das_03_0042__b15841944115413">Metadata Locks</strong> page.</p>
</div></div>
</div>
</div>
<div class="section" id="das_03_0042__section1260112713452"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0042__ol184041614194411"><li id="das_03_0042__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0042__li2145113319114"><span>On the <strong id="das_03_0042__b1482895081514">Overview</strong> page, click <strong id="das_03_0042__b88361450181516">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0042__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0042__b19334125381512">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0042__li5133192714446"><span>Choose <strong id="das_03_0042__b726523217262">Locks and Transactions</strong> &gt; <strong id="das_03_0042__b6830104152617">InnoDB Locks </strong>to check whether there are lock waits.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0041.html">Locks and Transactions</a></div>
</div>
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<h1 class="topictitle1">Metadata Locks</h1>
<div id="body0000001071644002"><div class="section" id="das_03_0043__section171085203429"><h4 class="sectiontitle">Overview</h4><ul id="das_03_0043__ul196775419461"><li id="das_03_0043__li15447153803212">Metadata locks (MDLs) are used to ensure consistency between DDL and DML operations. Usually, DDL operations require MDL write locks. Once a DML lock occurs, it can have a significant impact on the database because all subsequent operations (SELECT, DML, and DDL operations) on the table will be blocked, causing a backlog of connections.</li><li id="das_03_0043__li19967254184617">The system displays the database MDL locks in real time. With these locks, you can quickly locate MDL problems and terminate the sessions holding MDL locks, so that blocked operations can be restored.<div class="note" id="das_03_0043__note15314132134120"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="das_03_0043__ul15381654162711"><li id="das_03_0043__li13967155412469">This feature does not support DML locks. You can view and analyze them on the <strong id="das_03_0043__b1110161017577">InnoDB Locks </strong>page.</li><li id="das_03_0043__li149671354174613">Currently, this feature is available for only MySQL 5.6 and 5.7.</li><li id="das_03_0043__li4888165712276">A maximum of 1,000 records can be displayed.</li><li id="das_03_0043__li9210171511415">GaussDB(for MySQL) DB instances are currently not supported.</li></ul>
</div></div>
</li></ul>
</div>
<div class="section" id="das_03_0043__section1260112713452"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0043__ol184041614194411"><li id="das_03_0043__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0043__li2145113319114"><span>On the <strong id="das_03_0043__b38151310171620">Overview</strong> page, click <strong id="das_03_0043__b19823111031617">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0043__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0043__b12665012101619">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0043__li5133192714446"><span>Choose <strong id="das_03_0043__b19499252143419">Locks and Transactions</strong> &gt; <strong id="das_03_0043__b123077616356">Metadata Locks</strong>.</span></li><li id="das_03_0043__li111247282503"><span>Select a lock status and type, and enter a database name, table name, and session ID as needed. Then, click <strong id="das_03_0043__b57951615143711">Query</strong> to query required sessions.</span></li><li id="das_03_0043__li15884849483"><span>In the query result, check whether there are sessions that hold MDL locks. If so, select the sessions as required and click <strong id="das_03_0043__b15112483917">Kill Session</strong>.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0041.html">Locks and Transactions</a></div>
</div>
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<h1 class="topictitle1">Historical Transactions</h1>
<div id="body0000001071835930"><div class="section" id="das_03_0044__section171085203429"><h4 class="sectiontitle">Overview</h4><p id="das_03_0044__p173721117154717">This feature is used to analyze and discover big transactions and the transactions that are not committed for a long time in the database.</p>
<div class="note" id="das_03_0044__note15314132134120"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="das_03_0044__p144620612510">GaussDB(for MySQL) DB instances are currently not supported.</p>
</div></div>
</div>
<div class="section" id="das_03_0044__section1260112713452"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0044__ol184041614194411"><li id="das_03_0044__li85211981017"><span>Log in to the DAS console using your username and password.</span></li><li id="das_03_0044__li2145113319114"><span>On the <strong id="das_03_0044__b1488210176167">Overview</strong> page, click <strong id="das_03_0044__b13890161761615">Go to Intelligent O&amp;M</strong>.</span></li><li id="das_03_0044__li2566183817210"><span>Locate your desired instance and click <strong id="das_03_0044__b17951201914163">Details</strong> to go to the Intelligent O&amp;M overview page.</span></li><li id="das_03_0044__li5133192714446"><span>Choose <strong id="das_03_0044__b974592882916">Locks and Transactions</strong> &gt; <strong id="das_03_0044__b7343747192917">Historical Transactions</strong>.</span></li><li id="das_03_0044__li111247282503"><span>Select a start date and end date as required and refresh the page.</span></li><li id="das_03_0044__li1247581010557"><span>Analyze large transactions and those that are not submitted for a long time in the historical transaction list.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_03_0041.html">Locks and Transactions</a></div>
</div>
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<a name="das_03_0090"></a><a name="das_03_0090"></a>
<h1 class="topictitle1">Creating a Database</h1>
<div id="body1595322270690"><div class="section" id="das_03_0090__section8389334183913"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0090__ol2089904013560"><li id="das_03_0090__li1989954055610"><span>In the database list of the <strong id="das_03_0090__b12887184291">Home</strong> page, click <span class="uicontrol" id="das_03_0090__uicontrol196818182910"><b>Create Database</b></span>.</span></li><li id="das_03_0090__li183231794584"><span>On the displayed page, enter a database name and select a character set.</span></li><li id="das_03_0090__li19802321214"><span>Click <span class="uicontrol" id="das_03_0090__uicontrol315811552293"><b>OK</b></span>. The database you create appears in the database list.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_04_0031.html">Homepage</a></div>
</div>
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<h1 class="topictitle1">Logging In to Databases Shared by Others</h1>
<div id="body0000001093418989"><div class="section" id="das_03_0100__section98252105111"><h4 class="sectiontitle">Scenarios</h4><p id="das_03_0100__p28291220181614">You have a database instance and want to share it with another account or another user of the same account, but you do not want this other account or user to know the password of the shared login, or view your database instances besides the shared one.</p>
</div>
<div class="section" id="das_03_0100__section1118211197128"><h4 class="sectiontitle">Prerequisites</h4><ul id="das_03_0100__ul13749232195112"><li id="das_03_0100__li1175063255110">There are two accounts, or one account and two IAM users.</li><li id="das_03_0100__li1373855452214">You have obtained the UID (user ID) of the IAM user.</li><li id="das_03_0100__li1750133219516">You have logged in to the DAS console.</li></ul>
</div>
<div class="section" id="das_03_0100__section0874431695"><h4 class="sectiontitle">Usage Restrictions</h4><ul id="das_03_0100__ul7510975159"><li id="das_03_0100__li1451157171515">Users having shared database logins cannot add databases or users.</li><li id="das_03_0100__li326623452118">Shared databases do not have the data tracking, rollback, and background task features.</li></ul>
</div>
<div class="section" id="das_03_0100__section18931391078"><h4 class="sectiontitle">Procedure</h4><ol id="das_03_0100__ol68602151576"><li id="das_03_0100__li1135742435812"><span>Log in to the DAS console using the username and password of an IAM user.</span></li><li id="das_03_0100__li1725657175913"><span>On the overview page, click <strong id="das_03_0100__b121352242515">Go to Development Tool</strong>.</span></li><li id="das_03_0100__li120319412593"><span>In the right pane, click the <span class="uicontrol" id="das_03_0100__uicontrol19769123013215"><b>Database Logins Shared by Others</b></span> tab.</span></li><li id="das_03_0100__li124618311205"><span>Click <span class="uicontrol" id="das_03_0100__uicontrol34391240114210"><b>View My User ID</b></span>. On the displayed page, copy the UID.</span></li><li id="das_03_0100__li1586017151576"><span>Log in to the DAS console using the username and password of the account.</span></li><li id="das_03_0100__li185550192518"><span>On the overview page, click <strong id="das_03_0100__b2897234111214">Go to Development Tool</strong>.</span></li><li id="das_03_0100__li614312394712"><span>On the <strong id="das_03_0100__b18847143941310">My Database Logins</strong> tab, locate the login you want to share and click the number in the <strong id="das_03_0100__b81631231099">Additional Users</strong> column.</span></li><li id="das_03_0100__li17824243163415"><span>On the displayed <strong id="das_03_0100__b2885109201613">View Additional Users</strong> page, click <span class="uicontrol" id="das_03_0100__uicontrol188566321996"><b>Add User</b></span>.</span></li><li id="das_03_0100__li1928752719365"><span>On the displayed <strong id="das_03_0100__b75091431121713">Add User</strong> page, select the adding method.</span><p><ul id="das_03_0100__ul45501238399"><li id="das_03_0100__li135501381994"><strong id="das_03_0100__b432585031714">Manual input</strong>: Enter the UID of user to whom you want to share your database login. If multiple users need to be added, separate their UIDs with semicolons (;).</li><li id="das_03_0100__li1155011381295"><strong id="das_03_0100__b126725718182">Synchronize IAM account</strong>: Select another IAM user of the current account.</li><li id="das_03_0100__li11550133817919"><strong id="das_03_0100__b38497508197">Synchronize EPS user</strong>: Select the target users from the group of the enterprise project.</li></ul>
</p></li><li id="das_03_0100__li2497144915536"><span>Confirm the settings and click <span class="uicontrol" id="das_03_0100__uicontrol83142418613"><b>OK</b></span>.</span></li><li id="das_03_0100__li12117134371016"><span>Return to the DAS console and check whether the users are successfully added.</span></li><li id="das_03_0100__li5814842121318"><span>Click <strong id="das_03_0100__b796016392210">Log In</strong> to log in to the shared database.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_20_0011.html">User Guide</a></div>
</div>
</div>

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<h1 class="topictitle1">MySQL DB Instance Management (Development Tool)</h1>
<div id="body1526022397426"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_04_0031.html">Homepage</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0045.html">SQL Operations</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_08_0010.html">Database Management</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0098.html">Import and Export</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0085.html">Structure Management</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0056.html">Data Scheme</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0083.html">Background Tasks</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0063.html">Intelligent O&amp;M</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0059.html">Account Management</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_20_0011.html">User Guide</a></div>
</div>
</div>

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<a name="das_04_0008"></a><a name="das_04_0008"></a>
<h1 class="topictitle1">Table Management</h1>
<div id="body1526025887520"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="das_04_0009.html">Creating a Table</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0010.html">Opening a Table</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0011.html">Viewing Table Details</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0012.html">Altering a Table</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0013.html">Renaming a Table</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0014.html">Clearing a Table</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0018.html">Dropping a Table</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="das_04_0069.html">Maintaining a Table</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="das_08_0010.html">Database Management</a></div>
</div>
</div>

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