ab是apache自带的一款功能强大的测试工具 安装了apache一般就自带了， 用法可以查看它的说明 $ ./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) 参数众多，一般我们用到的是-n 和-c 例如： ./ab -c 1000 -n 100 这个表示同时处理1000个请求并运行100次index.php文件.
四、Siege
一款开源的压力测试工具，可以根据配置对一个WEB站点进行多用户的并发访问，记录每个用户所有请求过程的相应时间，并在一定数量的并发访问下重复进行。 官方： Siege下载： 解压： # tar -zxf siege-2.67.tar.gz 进入解压目录： # cd siege-2.67/ 安装： #./configure ; make #make install 使用 siege -c 200 -r 10 -f example.url -c是并发量，-r是重复次数。 url文件就是一个文本，每行都是一个url，它会从里面随机访问的。 example.url内容:
