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zhoumeng
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Reviewed-by: Hajba, László Antal <laszlo-antal.hajba@t-systems.com> Co-authored-by: zhoumeng <zhoumeng35@huawei.com> Co-committed-by: zhoumeng <zhoumeng35@huawei.com>
14 lines
1.8 KiB
HTML
14 lines
1.8 KiB
HTML
<a name="elb_faq_0052"></a><a name="elb_faq_0052"></a>
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<h1 class="topictitle1">What Do I Do If a Load Balancer Fails a Stress Test?</h1>
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<div id="body1537450788438"><ol id="elb_faq_0052__ol140474553419"><li id="elb_faq_0052__li640464543416">Check the load of backend servers. If their vCPU usage reaches 100%, applications may have performance bottlenecks.</li><li id="elb_faq_0052__li1640419457346">Check the incoming traffic. If burst traffic exceeds the bandwidth set for the EIP, a large number of packets will be lost and requests will not be responded to, thereby affecting the load balancer's performance.<div class="note" id="elb_faq_0052__note87571310132318"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="elb_faq_0052__p5757610192318">If burst traffic exceeds the available bandwidth, it does not mean that the bandwidth is fully used. In this case, you need perform further operations to locate the fault or increase the bandwidth.</p>
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</div></div>
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</li><li id="elb_faq_0052__li791993451610">Check the number of short connections in the <strong id="elb_faq_0052__b1531518182445">time_wait</strong> state on the clients. One possible cause is that there are insufficient client ports.</li><li id="elb_faq_0052__li1140474503412">The listening queue backlog of the backend servers may be full. If this happens, the backend server will not respond to SYN ACK packets, and the client will time out. You can increase the maximum allowed of the backlog by adjusting the <strong id="elb_faq_0052__b8423527061595">net.core.somaxconn</strong> parameter.</li></ol>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="elb_faq_0127.html">Load Balancing Performance</a></div>
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</div>
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