ApacheBench 主要是用来测试阿帕奇服务器执行效率用的。安装好 apache 服务器套件后，进入 bin 目录，就可以找到该可执行文件 ab.exe 。
ApacheBench 可以针对某一特定 URL 模拟出连续的联机请求，同时还可以仿真出同时间点个数相同的联机请求，因而利用 ApacheBench 可帮助我们在网站开发期间仿真实际上线可能的情况，利用仿真出来的数据做为调整服务器设定或程序的依据。
ab 用法如下
Usage: ab [options] [http[s]://]hostname[:port]/path
Options are:
-n requests Number of requests to perform # 请求次数
-c concurrency Number of multiple requests to make ＃同一时间发出多少个请求（并行连接）
-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
-s Use httpS instead of HTTP (SSL)
-h Display usage information (this message)
基本用法 :
ab -n 全部请求数 -c 并发数 测试 url
例 :ab -n 1000 -c 50 http://www.abc.com/a.php
得到结果类似于 ( 后面颜色字为中文翻译 ):
Server Software: Apache/2.0.55
Server Hostname: localhost
Server Port: 80
Document Path: /1.php
Document Length: 82522 bytes # 请求文档大小
Concurrency Level: 50 # 并发数
Time taken for tests: 92.76140 seconds # 全部请求完成耗时
Complete requests: 10000 # 全部请求数
Failed requests: 1974 # 失败的请求
(Connect: 0, Length: 1974, Exceptions: 0)
Write errors: 0
Total transferred: 827019400 bytes # 总传输大小
HTML transferred: 825219400 bytes
Requests per second: 108.61 [#/sec] (mean) # 每秒请求数 ( 平均 )
Time per request: 460.381 [ms] (mean) # 每次并发请求时间 ( 所有并发 )
Time per request: 9.208 [ms] (mean, across all concurrent requests) # 每一请求时间 ( 并发平均 )
Transfer rate: 8771.39 [Kbytes/sec] received # 传输速率
Connection Times (ms) # 连接时间
min mean[+/-sd] median max
Connect(# 连接 ): 0 0 2.1 0 46
Processing(# 处理 ): 31 458 94.7 438 1078
Waiting(# 等待 ): 15 437 87.5 422 938
Total: 31 458 94.7 438 1078
其它参数 :
-n requests 全部请求数
-c concurrency 并发数
-t timelimit 最传等待回应时间
-p postfile POST 数据文件
-T content-type POST Content-type
-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 加入 cookie, eg. 'Apache=1234. (repeatable)
-H attribute 加入 http 头 , eg. 'Accept-Encoding: gzip'
Inserted after all normal header lines. (repeatable)
-A attribute http 验证 , 分隔传递用户名及密码
-P attribute Add Basic Proxy Authentication, the attributes
are a colon separated username and password.
-X proxy:port 代理服务器
-V 查看 ab 版本
-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)