20-ab压力测试及nginx性能统计模块
优化的启发，打开的文件太多
Nginx 错误日志显示，打开文件数太多
系统层面
more /proc/sys/net/core/somaxconn
单个Nginx 测试index.html
没优化前
[root@/home/www]#ab -c 4000 -n 100000 http://test.demo.com/index.htmlConcurrency Level: 4000Time taken for tests: 18.596 secondsComplete requests: 100000Failed requests: 99350 (Connect: 0, Receive: 0, Length: 99350, Exceptions: 0)Non-2xx responses: 99780Total transferred: 31953900 bytesHTML transferred: 16180560 bytesRequests per second: 5377.62 [#/sec] (mean)Time per request: 743.823 [ms] (mean)Time per request: 0.186 [ms] (mean, across all concurrent requests)Transfer rate: 1678.09 [Kbytes/sec] receivedConnection Times (ms) min mean[+/-sd] median maxConnect: 0 204 582.3 2 7522Processing: 2 101 612.0 12 17019Waiting: 2 76 287.2 12 6939Total: 3 305 862.2 14 17019Percentage of the requests served within a certain time (ms) 50% 14 66% 17 75% 208 80% 217 90% 1014 95% 1238 98% 3017 99% 3218 100% 17019 (longest request)
优化后
[root@/home/www]#ab -c 4000 -n 100000 http://test.demo.com/index.htmlConcurrency Level: 4000Time taken for tests: 8.154 secondsComplete requests: 100000Failed requests: 0Non-2xx responses: 100000Total transferred: 32000000 bytesHTML transferred: 16200000 bytesRequests per second: 12263.42 [#/sec] (mean)Time per request: 326.173 [ms] (mean)Time per request: 0.082 [ms] (mean, across all concurrent requests)Transfer rate: 3832.32 [Kbytes/sec] receivedConnection Times (ms) min mean[+/-sd] median maxConnect: 1 139 418.0 5 3031Processing: 2 101 106.9 74 1542Waiting: 2 99 106.7 73 1542Total: 3 240 433.1 81 4542Percentage of the requests served within a certain time (ms) 50% 81 66% 91 75% 115 80% 268 90% 1066 95% 1085 98% 1275 99% 3018 100% 4542 (longest request)
ab 测试过程出现的以下问题，则是由于客户端原因造成的，而不是服务器原因，修改客户端配置既可以
Completed 1000 requestsCompleted 2000 requestsapr_socket_recv: Connection timed out (110)Total of 2893 requests completed