概述
这是apache自带的一个网站压力测试工具，是ApacheBench的缩写，我们可以使用这个工具来对我们的网站进行压力测试
安装
在ubuntu上要安装下面这个包
sudo apt-get install apache2-utils
在centos下是下面这个包
sudo yum install httpd-tools -y
使用
可以直接输入ab来看参数和使用方法
➜ ~ abab: wrong number of argumentsUsage: ab [options] [http[s]://]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)
-Z ciphersuite Specify SSL/TLS cipher suite (See openssl ciphers)
-f protocol Specify SSL/TLS protocol
(TLS1, TLS1.1, TLS1.2 or ALL)
➜ ~
下面介绍一个最常用的使用方法
ab -c 10 -n 100 http://www.example.com/
上面的意思是模仿10个用户对网站进行1000次请求
下面是输出
➜ ~ ab -c 10 -n 100 http://www.linux.cn/ This is ApacheBench, Version 2.3 <$Revision: 1706008 $>Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking www.linux.cn (be patient).....done
Server Software: nginxServer Hostname: www.linux.cnServer Port: 80
Document Path: /Document Length: 178 bytes
Concurrency Level: 10Time taken for tests: 0.861 secondsComplete requests: 100Failed requests: 0Non-2xx responses: 100Total transferred: 35800 bytesHTML transferred: 17800 bytesRequests per second: 116.09 [#/sec] (mean)Time per request: 86.142 [ms] (mean)Time per request: 8.614 [ms] (mean, across all concurrent requests)Transfer rate: 40.59 [Kbytes/sec] received
Connection Times (ms) min mean[+/-sd] median maxConnect: 32 41 7.3 37 53Processing: 33 42 7.4 38 55Waiting: 33 42 7.4 38 55Total: 65 83 14.7 75 108
Percentage of the requests served within a certain time (ms) 50% 75 66% 78 75% 102 80% 103 90% 105 95% 106 98% 107 99% 108 100% 108 (longest request)
其实你最主要看的输出参数是下面这几个
- Server Software 服务器软件
- Server Hostname 主机名
- Server Port 服务器端口
- Time taken for tests 测试时间
- Complete requests完成的请求
- Failed requests 失败的请求
- Time per request 每次请求的时间
- Transfer rate 传输速度
