1.安裝ab命令
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sudo apt-get install apache2-utils
2.ab命令参数说明
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Usage: ab [options] [http[s]://]hostname[:port]/path
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Options are:
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//总的请求数
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-n requests Number of requests to perform宅
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//一次同时并发的请求数 总的请求数(n)=次数*一次并发数(c)
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-c concurrency Number of multiple requests to make
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-t timelimit Seconds to max. wait for responses
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-b windowsize Size of TCP send/receive buffer, in bytes
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-p postfile File containing data to POST. Remember also to set -T
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-u putfile File containing data to PUT. Remember also to set -T
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-T content-type Content-type header for POSTing, eg.
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‘application/x-www-form-urlencoded‘
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Default is ‘text/plain‘
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-v verbosity How much troubleshooting info to print
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-w Print out results in HTML tables
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-i Use HEAD instead of GET
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-x attributes String to insert as table attributes
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-y attributes String to insert as tr attributes
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-z attributes String to insert as td or th attributes
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-C attribute Add cookie, eg. ‘Apache=1234. (repeatable)
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-H attribute Add Arbitrary header line, eg. ‘Accept-Encoding: gzip‘
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Inserted after all normal header lines. (repeatable)
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-A attribute Add Basic WWW Authentication, the attributes
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are a colon separated username and password.
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-P attribute Add Basic Proxy Authentication, the attributes
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are a colon separated username and password.
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-X proxy:port Proxyserver and port number to use
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-V Print version number and exit
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-k Use HTTP KeepAlive feature
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-d Do not show percentiles served table.
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-S Do not show confidence estimators and warnings.
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-g filename Output collected data to gnuplot format file.
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-e filename Output CSV file with percentages served
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-r Don‘t exit on socket receive errors.
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-h Display usage information (this message)
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-Z ciphersuite Specify SSL/TLS cipher suite (See openssl ciphers)
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-f protocol Specify SSL/TLS protocol (SSL2, SSL3, TLS1, or ALL)
3.运行 ab -n 100 -c 10 http://www.meetu.hk/ 对 http://www.meetu.hk/ 进行100次请求，10个并发请求压力测试结果。
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Server Software: lighttpd/1.4.20
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Server Hostname: www.meetu.hk
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Server Port: 80
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Document Path: /
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Document Length: 2095 bytes
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Concurrency Level: 10
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//整个测试持续的时间
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Time taken for tests: 3.303 seconds
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//完成的请求数量
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Complete requests: 100
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Failed requests: 0
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Write errors: 0
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Total transferred: 235200 bytes
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HTML transferred: 209500 bytes
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//平均每秒处理30个请求
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Requests per second: 30.27 [#/sec] (mean)
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//平均每个请求处理时间为330毫秒 注:这里将一次10个并发请求看成一个整体
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Time per request: 330.335 [ms] (mean)
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//平均每个并发请求处理 时间 为33毫秒
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Time per request: 33.034 [ms] (mean, across all concurrent requests)
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Transfer rate: 69.53 [Kbytes/sec] received
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Connection Times (ms)
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min mean[+/-sd] median max
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Connect: 51 170 35.9 178 230
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Processing: 60 153 64.5 121 263
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Waiting: 55 148 64.4 115 258
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Total: 235 322 59.9 299 437
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Percentage of the requests served within a certain time (ms)
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//在这100个请求中有50%在299毫秒内完成
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50% 299
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//在这100个请求中有66%在312毫秒内完成
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66% 312
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75% 383
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80% 412
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90% 431
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95% 432
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98% 436
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99% 437
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100% 437 (longest request)
ubuntu 14.04 LTS 安装webbentch压力测试工具
原文：http://blog.csdn.net/bugall/article/details/45871201
