我有Ubuntu 12.04.5 LTS，django（supervisorctl，gunicorn）的网站。 它工作1年没有问题，但今天我的zabbix服务器发送有关警报（每3-7分钟）关于超时（1-2秒）的消息。 我为nginx运行debugging模式：
2015/08/26 06:24:09 [debug] 24236#0: *214786 http upstream temp fd: -1 2015/08/26 06:24:09 [debug] 24236#0: *214786 http output filter "/management/verify/[email protected]&app_version=4.1&warehouse=131&only_hash=0&pin_number=" 2015/08/26 06:24:09 [debug] 24236#0: *214786 http copy filter: "/management/verify/[email protected]&app_version=4.1&warehouse=131&only_hash=0&pin_number=" 2015/08/26 06:24:09 [debug] 24236#0: *214786 image filter 2015/08/26 06:24:09 [debug] 24236#0: *214786 xslt filter body 2015/08/26 06:24:09 [debug] 24236#0: *214786 http postpone filter "/management/verify/[email protected]&app_version=4.1&warehouse=131&only_hash=0&pin_number=" 00007FFF740F6500 2015/08/26 06:24:09 [debug] 24236#0: *214786 http chunk: 0 2015/08/26 06:24:09 [debug] 24236#0: *214786 write new buf t:0 f:0 000000000210B710, pos 000000000049DEDA, size: 5 file: 0, size: 0 2015/08/26 06:24:09 [debug] 24236#0: *214786 http write filter: l:1 f:0 s:5 2015/08/26 06:24:09 [debug] 24236#0: *214786 http write filter limit 0 2015/08/26 06:24:09 [debug] 24236#0: *214786 writev: 5 2015/08/26 06:24:09 [debug] 24236#0: *214786 http write filter 0000000000000000 2015/08/26 06:24:09 [debug] 24236#0: *214786 http copy filter: 0 "/management/verify/[email protected]&app_version=4.1&warehouse=131&only_hash=0&pin_number=" 2015/08/26 06:24:09 [debug] 24236#0: *214786 http finalize request: 0, "/management/verify/[email protected]&app_version=4.1&warehouse=131&only_hash=0&pin_number=" a:1, c:1 2015/08/26 06:24:09 [debug] 24236#0: *214786 set http keepalive handler 2015/08/26 06:24:09 [debug] 24236#0: *214786 http close request 2015/08/26 06:24:09 [debug] 24236#0: *214786 http log handler 2015/08/26 06:24:09 [debug] 24236#0: *214786 free: 00000000021005C0 2015/08/26 06:24:09 [debug] 24236#0: *214786 free: 0000000000000000 2015/08/26 06:24:09 [debug] 24236#0: *214786 free: 0000000000000000 2015/08/26 06:24:09 [debug] 24236#0: *214786 free: 0000000000000000 2015/08/26 06:24:09 [debug] 24236#0: *214786 free: 00000000020F5160, unused: 2 2015/08/26 06:24:09 [debug] 24236#0: *214786 free: 000000000210AC50, unused: 787 2015/08/26 06:24:09 [debug] 24236#0: *214786 event timer add: 4: 600000:1440570849784 2015/08/26 06:24:09 [debug] 24236#0: *214786 free: 00000000021442A0 2015/08/26 06:24:09 [debug] 24236#0: *214786 free: 00000000020B4530 2015/08/26 06:24:09 [debug] 24236#0: *214786 hc free: 0000000000000000 0 2015/08/26 06:24:09 [debug] 24236#0: *214786 hc busy: 0000000000000000 0 2015/08/26 06:24:09 [debug] 24236#0: *214786 tcp_nodelay 2015/08/26 06:24:09 [debug] 24236#0: *214786 reusable connection: 1 2015/08/26 06:24:09 [debug] 24236#0: *214786 post event 0000000002153D48 2015/08/26 06:24:09 [debug] 24236#0: *214786 delete posted event 0000000002153D48 2015/08/26 06:24:09 [debug] 24236#0: *214786 http keepalive handler 2015/08/26 06:24:09 [debug] 24236#0: *214786 malloc: 00000000020B4530:1024 2015/08/26 06:24:09 [debug] 24236#0: *214786 recv: fd:4 -1 of 1024 2015/08/26 06:24:09 [debug] 24236#0: *214786 recv() not ready (11: Resource temporarily unavailable) 2015/08/26 06:24:09 [debug] 24236#0: *214786 post event 0000000002153D48 2015/08/26 06:24:09 [debug] 24236#0: *214786 post event 00000000021BBD58 2015/08/26 06:24:09 [debug] 24236#0: *214786 delete posted event 00000000021BBD58 2015/08/26 06:24:09 [debug] 24236#0: *214786 http empty handler 2015/08/26 06:24:09 [debug] 24236#0: *214786 delete posted event 0000000002153D48 2015/08/26 06:24:09 [debug] 24236#0: *214786 http keepalive handler 2015/08/26 06:24:09 [debug] 24236#0: *214786 recv: fd:4 0 of 1024 2015/08/26 06:24:09 [info] 24236#0: *214786 client 148.251.XXX.XXX closed keepalive connection 2015/08/26 06:24:09 [debug] 24236#0: *214786 close http connection: 4 2015/08/26 06:24:09 [debug] 24236#0: *214786 event timer del: 4: 1440570849784 2015/08/26 06:24:09 [debug] 24236#0: *214786 reusable connection: 0 什么是造成这个问题？