ab是apache自帶的乙個很好用的壓力測試工具。常用的命令如下：
ab -n 100 -c 100 url
-n：請求次數
-c：併發次數
結果如下：
concurrency level: 100
time taken for tests: 0.28327 seconds
complete requests: 100
failed requests: 0
write errors: 0
total transferred: 251000 bytes
html transferred: 228300 bytes
requests per second: 3530.20 [#/sec] (mean)
time per request: 28.327 [ms] (mean)
time per request: 0.283 [ms] (mean, across all concurrent requests)
transfer rate: 8648.99 [kbytes/sec] received
connection times (ms)
min mean[+/-sd] median max
connect: 2 2 0.7 2 3
processing: 4 13 5.6 14 23
waiting: 3 13 5.6 13 22
total: 6 16 6.0 16 26
percentage of the requests served within a certain time (ms)
50% 16
66% 20
75% 21
80% 22
90% 24
95% 26
98% 26
99% 26
100% 26 (longest request)
[search@qt-0104 ~]$
time per request: 每次請求的耗時percentage of the requests served within a certain time (ms) 耗時百分比
50% 16
66% 20
75% 21
80% 22
90% 24
95% 26
98% 26
99% 26
100% 26 (longest request)
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