ApacheBench(ab)服务器负载压力测试软件

2018-10-21

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ApacheBench(ab)使用简介
服务器负载太大而影响程序效率也是很常见的，Apache服务器自带有一个叫AB(ApacheBench)的工具，在bin目录下。使用这个轻巧的工具我们可以对服务器进行负载测试，

基本用法:

ab -n 全部请求数 -c 并发数测试url
例；ab -n 100 -c 50 http://192.168.22.150:8088/gfmis/login

http://19.104.10.79:8080/gfmis/login
例:ab -n 1000 -c 50 http://www.abc.com/a.php

得到结果类似于(后面颜色字为中文翻译):

Server Software: Apache/2.0.55
Server Hostname: localhost
Server Port: 80

Document Path: /1.php
Document Length: 82522 bytes #请求文档大小

Concurrency Level: 50 #并发数
Time taken for tests: 92.76140 seconds #全部请求完成耗时
Complete requests: 10000 #全部请求数
Failed requests: 1974 #失败的请求
(Connect: 0, Length: 1974, Exceptions: 0)
Write errors: 0
Total transferred: 827019400 bytes #总传输大小
HTML transferred: 825219400 bytes
Requests per second: 108.61 [#/sec] (mean) #每秒请求数(平均)
Time per request: 460.381 [ms] (mean) #每次并发请求时间(所有并发)
Time per request: 9.208 [ms] (mean, across all concurrent requests) #每一请求时间(并发平均)
Transfer rate: 8771.39 [Kbytes/sec] received #传输速率

Connection Times (ms) #连接时间
min mean [+/-sd] median max
Connect(#连接): 0 0 2.1 0 46
Processing(#处理): 31 458 94.7 438 1078
Waiting(#等待): 15 437 87.5 422 938
Total: 31 458 94.7 438 1078

其它参数:

-n requests 全部请求数
-c concurrency 并发数
-t timelimit 最长等待回应时间
-p postfile POST数据文件
-T content-type POST Content-type
-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 加入cookie, eg. ‘Apache=1234. (repeatable)
-H attribute 加入http头, eg. ‘Accept-Encoding: gzip’
Inserted after all normal header lines. (repeatable)
-A attribute http验证,分隔传递用户名及密码
-P attribute Add Basic Proxy Authentication, the attributes
are a colon separated username and password.
-X proxy:port 代理服务器
-V 查看ab版本
-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
-h Display usage information (this message)