简介
ab 是apache服务器性能测试工具，通过这个命令，指定单位时间内向服务器发送请求数量来看性能指标
语法
ab -n10000 -c100 http://127.0.0.1:3011/
- n 需要发送的请求数目
- c 一次发出多个请求的数量
主要是上面两个参数，其他可以通过ab --help查看
返回结构示例
This is ApacheBench, Version 2.3 <$Revision: 1826891 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 127.0.0.1 (be patient)
Completed 1000 requests
Completed 2000 requests
Completed 3000 requests
Completed 4000 requests
Completed 5000 requests
Completed 6000 requests
Completed 7000 requests
Completed 8000 requests
Completed 9000 requests
Completed 10000 requests
Finished 10000 requests
Server Software:
Server Hostname: 127.0.0.1
Server Port: 3011
Document Path: /
Document Length: 12 bytes
Concurrency Level: 100
Time taken for tests: 3.581 seconds
Complete requests: 10000
Failed requests: 0
Total transferred: 502800 bytes
HTML transferred: 120672 bytes
Requests per second: 2792.46 [#/sec] (mean)
Time per request: 35.811 [ms] (mean)
Time per request: 0.358 [ms] (mean, across all concurrent requests)
Transfer rate: 137.11 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 18 18.3 15 191
Processing: 1 18 17.5 15 191
Waiting: 0 11 14.7 9 174
Total: 7 35 25.6 32 202
Percentage of the requests served within a certain time (ms)
50% 32
66% 37
75% 40
80% 41
90% 48
95% 52
98% 159
99% 197
100% 202 (longest request)
