使用ab命令對網站進行壓力測試
- 2019 年 10 月 4 日
- 筆記
概述
這是apache自帶的一個網站壓力測試工具，是ApacheBench的縮寫，我們可以使用這個工具來對我們的網站進行壓力測試
安裝
在ubuntu上要安裝下面這個包 sudo apt-get install apache2-utils 在centos下是下面這個包 sudo yum install httpd-tools -y
使用
可以直接輸入ab來看參數和使用方法
➜ ~ ab ab: wrong number of arguments Usage: ab [options] [http[s]://]hostname[:port]/path Options 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) ➜ ~
下面介紹一個最常用的使用方法 ab -c 10 -n 100 http://www.example.com/ 上面的意思是模仿10個用戶對網站進行1000次請求 下面是輸出
➜ ~ 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: nginx Server Hostname: www.linux.cn Server Port: 80 Document Path: / Document Length: 178 bytes Concurrency Level: 10 Time taken for tests: 0.861 seconds Complete requests: 100 Failed requests: 0 Non-2xx responses: 100 Total transferred: 35800 bytes HTML transferred: 17800 bytes Requests 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 max Connect: 32 41 7.3 37 53 Processing: 33 42 7.4 38 55 Waiting: 33 42 7.4 38 55 Total: 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)
其實你最主要看的輸出參數是下面這幾個
- Server Software 服務器軟件
- Server Hostname 主機名
- Server Port 服務器端口
- Time taken for tests 測試時間
- Complete requests完成的請求
- Failed requests 失敗的請求
- Time per request 每次請求的時間
- Transfer rate 傳輸速度
