压力 性能 测试 工具 ab （apache benchmark） jmeter

快速开始

ab参数很多,一般我们用 -c 和 -n 参数就可以了. 例如: 
./ab -c 100 -n 10000 http://127.0.0.1/index.php 

介绍

ab(apache benchmark) —— apache自带的一个测试工具，一般把apache压力测试称为AB测试. ab工具的位置在apache的bin目录里，参数说明：

Usage: ./ab [options] [http://]hostname[:port]/pathOptions are:    -n requests     Number of requests to perform    -c concurrency  Number of multiple requests to make at a time    -t timelimit    Seconds to max. to spend on benchmarking                    This implies -n 50000    -s timeout      Seconds to max. wait for each response                    Default is 30 seconds    -b windowsize   Size of TCP send/receive buffer, in bytes    -B address      Address to bind to when making outgoing connections    -p postfile     File containing data to POST. Remember also to set -T    -u putfile      File containing data to PUT. Remember also to set -T    -T content-type Content-type header to use for POST/PUT data, eg.                    'application/x-www-form-urlencoded'                    Default is 'text/plain'    -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.    -q              Do not show progress when doing more than 150 requests    -l              Accept variable document length (use this for dynamic pages)    -g filename     Output collected data to gnuplot format file.    -e filename     Output CSV file with percentages served    -r              Don't exit on socket receive errors.    -m method       Method name    -h              Display usage information (this message)

ab常用参数的介绍

• -n ：总共的请求执行数，缺省是1；
• -c： 并发数，缺省是1；
• -t：测试所进行的总时间，秒为单位，缺省50000s
• -p：POST时的数据文件
• -w: 以HTML表的格式输出结果

举例：

执行测试用例：ab -n 1000 -c 100 -w http://localhost/index.php >>c:\1.html

上面的测试用例表示100并发的情况下，共测试访问index.php脚本1000次，并将测试结果保存到c:\1.html文件中

分析测试结果，可知在该100并发访问的情况下，共测试访问1000次，失败了xxx次。进而可知该脚本在此环境是否可以满足100并发访问的要求，然后通过调节并发数并重新检查失败次数，可得出在多少并发下系统可正常工作。

对于java开发人员也可学习下  apache的另外一个测试工具，Apache性能测试工具：JMeter 

网站：http://jmeter.apache.org