转载：Apache自带性能测试工具ab的使用：

http://www.51testing.com/?uid-202848-action-viewspace-itemid-117467

1 概述

　　ab(ApacheBench)是Apache自带的超文本传输协议(HTTP)性能测试工具。 其设计意图是描绘当前所安装的Apache的执行性能， 主要是显示你安装的Apache每秒可以处理多少个请求。

2.1 安装

　　Apache服务器套件自带ab，只要安装Apache即可，无需另行安装ab。ab位于%ApacheHome%/bin目录下(“%ApacheHome%”为Aapche安装路径)，你也可以把ab.exe文件copy出来，独立使用。

　　2.2 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)