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<p class="MsoNormal"><span lang="EN-US">Hi<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> I got some but not that much errer log in error.log like :
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:63.0pt;text-indent:21.0pt"><span lang="EN-US">round robin upstream stuck on 1 tries while connecting to upstream, client: xxxx , server: xxxx, request: "GET xxxx”<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:63.0pt;text-indent:21.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> I tuned log level to critical, it appears every 10 , 20 or 30 mins, I am using upstream module for load balancing with about 10000+ established connection.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Does it mean that my frontend servers are overloaded or the backend servers/VIP response is too slow?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:21.0pt"><span lang="EN-US">my “frontend server” directives looks like :<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:63.0pt;text-indent:21.0pt"><span lang="EN-US">proxy_connect_timeout 10s;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> proxy_send_timeout 10s;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> proxy_read_timeout 10s;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> proxy_next_upstream timeout;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> and my “upstream “ directives looks like:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:63.0pt;text-indent:21.0pt"><span lang="EN-US">upstream mini.tudou.com {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> xxxx;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> backend server xxxx:80 ;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> backend server xxxxx:80 ;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> } <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thx<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jie<o:p></o:p></span></p>
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