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Wang , Deng Ke
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Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com> Co-authored-by: Wang , Deng Ke <wangdengke2@huawei.com> Co-committed-by: Wang , Deng Ke <wangdengke2@huawei.com>
16 lines
2.4 KiB
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16 lines
2.4 KiB
HTML
<a name="rds_faq_0022"></a><a name="rds_faq_0022"></a>
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<h1 class="topictitle1">What Should I Do If an RDS Database Problem Causes a Connection Failure?</h1>
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<div id="body8662426"><p id="rds_faq_0022__a1f01bc0691974549a34fe0a8c5112a55">Check whether any of the following problems occurred on the <span id="rds_faq_0022__text17163125818533">RDS</span> DB instance.</p>
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<ol id="rds_faq_0022__ocad797bc243d4670b045840f3527d1e4"><li id="rds_faq_0022__l730415bd06d24bcd8827b0f89820e81f">The RDS DB instance is not properly connected.<p id="rds_faq_0022__ae0e4c98a859e4e198745df83047a3660"><a name="rds_faq_0022__l730415bd06d24bcd8827b0f89820e81f"></a><a name="l730415bd06d24bcd8827b0f89820e81f"></a><strong id="rds_faq_0022__b1445643415195">Solution</strong>: Check the connection. If you connect to the RDS DB instance through a private network, the ECS and DB instance must be in the same VPC and the DB instance can be accessed only through an ECS in the same VPC. If you connect to the RDS DB instance through a public network, the ECS and DB instance can be in different VPCs.</p>
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</li><li id="rds_faq_0022__l3e3a8768ebea45c49cd7447d51ccfcd3">The maximum number of connections has been reached.<p id="rds_faq_0022__a8b56e1ed9a5e4bfeb541d16cf663dc31"><a name="rds_faq_0022__l3e3a8768ebea45c49cd7447d51ccfcd3"></a><a name="l3e3a8768ebea45c49cd7447d51ccfcd3"></a><strong id="rds_faq_0022__b62461156162012">Solution</strong>: Use <span id="rds_faq_0022__text14215111912451">RDS</span> resource monitoring to check if the CPU usage and the number of current connections are abnormal. If either of them has reached the maximum, reboot, disconnect, or scale up the class of the <span id="rds_faq_0022__text1513950135217">RDS</span> DB instance. </p>
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</li><li id="rds_faq_0022__l494995712bcb413badba0b09a463d6f3">The DB instance is abnormal. For example, the <span id="rds_faq_0022__text7477228524">RDS</span> DB instance fails to be rebooted, the system is faulty, or the instance or table is locked.<p id="rds_faq_0022__afb67375f77244b8688ea33c15b76b981"><strong id="rds_faq_0022__b1773617413287">Solution</strong>: Reboot the RDS DB instance to see if the problem is resolved. If the problem persists, contact post-sales technical support.</p>
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</li></ol>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rds_faq_0141.html">Database Connection</a></div>
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</div>
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</div>
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