压力测试 apache ab工具使用说明

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1 . 安裝ab工具命令
sudo apt-get install apache2-utils
2.ab命令参数说明
Usage: ab [options] [http://]hostname[:port]/path
Options are:
//请求数
-n requests Number of requests to perform   
//并发数
-c concurrency Number of multiple requests to make
-t timelimit Seconds to max. wait for responses
-b windowsize Size of TCP send/receive buffer, in bytes
//post文件(包含post数据)，同事要设置-T
-p postfile File containing data to POST. Remember also to set -T
-u putfile File containing data to PUT. Remember also to set -T
//为POST设置内容类型头部
-T content-type Content-type header for POSTing, eg.
'application/x-www-form-urlencoded'
Default is 'text/plain'
//打印故障排除信息
-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
//设置Cookie
-C attribute Add cookie, eg. 'Apache=1234. (repeatable)
//设置头部行
-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
-r Don't exit on socket receive errors.
-h Display usage information (this message)
-Z ciphersuite Specify SSL/TLS cipher suite (See openssl ciphers)
-f protocol Specify SSL/TLS protocol (SSL2, SSL3, TLS1, or ALL)
3.使用方法
运行 ab -n 100 -c 10 http://keketour.me/
对 http://keketour.me/  网站 进行着100次请求,10个请求同时并发
压力测试结果

• Server Software: lighttpd/1.4.20
• Server Hostname: www.meetu.hk
• Server Port: 80
• Document Path: /
• Document Length: 2095 bytes
• Concurrency Level: 10
• //整个测试持续的时间
• Time taken for tests: 3.303 seconds
• //完成的请求数量
• Complete requests: 100
• Failed requests: 0
• Write errors: 0
• Total transferred: 235200 bytes
• HTML transferred: 209500 bytes
• //平均每秒处理30个请求
• Requests per second: 30.27 [#/sec] (mean)
• //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
• Time per request: 330.335 [ms] (mean)
• //平均每个并发请求处理 时间 为33毫秒
• Time per request: 33.034 [ms] (mean, across all concurrent requests)
• Transfer rate: 69.53 [Kbytes/sec] received
• Connection Times (ms)
• min mean[+/-sd] median max
• Connect: 51 170 35.9 178 230
• Processing: 60 153 64.5 121 263
• Waiting: 55 148 64.4 115 258
• Total: 235 322 59.9 299 437
• Percentage of the requests served within a certain time (ms)
• //在这100个请求中有50%在299毫秒内完成
• 50% 299
• //在这100个请求中有66%在312毫秒内完成
• 66% 312
• 75% 383
• 80% 412
• 90% 431
• 95% 432
• 98% 436
• 99% 437
• 100% 437 (longest request)
  

注意：
模拟登陆的时候，只需要设置Cookie:
1.先用账户和密码登录后，用开发者工具找到标识这个会话的Cookie值（Session ID）记下来
2.如果只用到一个Cookie，那么只需键入命令：
ab －n 100 -c 10 －C jiang_token＝3820aab5-a395-48b2-8d2b-87bf47026e78
http://keketour.me/
如果需要多个Cookie，就直接设Header：
ab -n 100 -H “Cookie: Key1=Value1; Key2=Value2” http://keketour.me/
测试API接口       (这里以添加行程方案为例)
ab -n 10 -c 5 -p /var/www/kkt/post.txt -v 3 -H "Cookie:jiang_token=3820aab5-a395-48b2-8d2b-87bf47026e78;X-Requested-With:XMLHttpRequest" -T application/x-www-form-urlencoded "http://keketour.me/product/tourinfo/savetournameajax"
其中post.txt为post参数文本,内容为
name=压力测试行程方案&tour_id=0&product_id=1382&_method=PATCH
总结：
ab工具ab小巧简单，上手学习较快，可以提供需要的基本性能指标，但是没有图形化结果，不能监控。因此ab工具可以用作临时紧急任务和简单测试。