Apache自带的性能测试工具ab的使用(收藏)

参数列表

C:\>ab
ab: wrong number of arguments
Usage: ab [options] [http://]hostname[:port]/path
Options are:
  -n requests   Number of requests to perform
  -c concurrency Number of multiple requests to make
  -t timelimit   Seconds to max. wait for responses
  -p postfile   File containing data to POST
  -T content-type Content-type header for POSTing
  -v verbosity   How much troubleshooting info to print
  -w         Print out results in HTML tables
  -i         Use HEAD instead of GET
  -x attributes   String to insert as table attributes
  -y attributes   String to insert as tr attributes
  -z attributes   String to insert as td or th attributes
  -C attribute   Add cookie, eg. 'Apache=1234. (repeatable)
  -H attribute   Add Arbitrary header line, eg. 'Accept-Encoding: gzip'
            Inserted after all normal header lines. (repeatable)
  -A attribute   Add Basic WWW Authentication, the attributes
            are a colon separated username and password.
  -P attribute   Add Basic Proxy Authentication, the attributes
            are a colon separated username and password.
  -X proxy:port   Proxyserver and port number to use
  -V         Print version number and exit
  -k         Use HTTP KeepAlive feature
  -d         Do not show percentiles served table.
  -S         Do not show confidence estimators and warnings.
  -g filename   Output collected data to gnuplot format file.
  -e filename   Output CSV file with percentages served
  -h         Display usage information (this message)

* 中文的列表可以查看Apache手册中文版。
以上参数最常用的是-n 在测试会话中所执行的请求个数；和-c 一次同时产生的并发请求个数。

实例

       假设我们要测试一个PHP论坛系统，其中一个性能测试用例是：“同时处理50个并发请求并运行 1000 次index.php 首页”，我们可以在cmd shell中输入 ab -n 1000 -c 50http://172.16.11.180:88/bbs/index.php，运行结束后，ab会自动显示测试结果，如下：

E:\Webser\Apache2\bin>ab -n 1000 -c 50http://172.16.11.180:88/bbs/index.php
This is ApacheBench, Version 2.0.41-dev <$Revision: 1.121.2.12 $> apache-2.0
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd,http://www.zeustech.net/
Copyright (c) 1998-2002 The Apache Software Foundation,http://www.apache.org/

Benchmarking 172.16.11.180 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Finished 1000 requests


Server Software:     Apache
Server Hostname:     172.16.11.180
Server Port:         88

Document Path:       /bbs/index.php
Document Length:     36962 bytes

Concurrency Level:     50
Time taken for tests:   262.515625 seconds
Complete requests:     1000
Failed requests:     198
  (Connect: 0, Length: 198, Exceptions: 0)
Write errors:       0
Total transferred:     37408432 bytes
HTML transferred:     36967364 bytes
Requests per second:   3.81 [#/sec] (mean)
Time per request:     13125.781 [ms] (mean)
Time per request:     262.516 [ms] (mean, across all concurrent requests)
Transfer rate:       139.16 [Kbytes/sec] received

Connection Times (ms)
        min mean[+/-sd] median   max
Connect:     0   1   4.5     0     15
Processing:   297 12818 2427.6 12921   30578
Waiting:     281 12801 2427.6 12906   30562
Total:     312 12820 2427.5 12921   30578

Percentage of the requests served within a certain time (ms)
50% 12921
66% 13203
75% 13453
80% 13546
90% 13781
95% 14156
98% 14750
99% 18328
100% 30578 (longest request)

以上结果指出，在并发50个请求的情况下，完成1000次的访问请求，共花了262.515秒，这个程序每秒可处理3.81个请求。