压力测试工具-AB(ApacheBench)

概述

AB(ApacheBench)用来做http的压力测试。
ubuntu里安装ab测试工具

sudo apt-get install apache2-utils  

测试命令

最常用的测试命令如下:

ab -n 100 -c 10 http://192.168.188.6:8080/distributeLock

－n表示请求数，－c表示并发数

带自定义header请求:

ab -n 1 -c 1 -H "Pragma:no-cache" http://192.168.188.6:8080/distributeLock

－H带header请求

模拟post请求

ab -n 1 -c 1 -p 'post.txt' -T 'application/x-www-form-urlencoded'   http://192.168.188.6:8080/distributeLock2

－p 用来做post数据的文件，这里此文件保存在ab同级目录下
- T 设置content-type值

其它ab命令参数见官方网站.

测试结果分析

执行命令:
ab -n 100 -c 10 http://192.168.188.6:8080/distributeLock

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 192.168.188.6 (be patient).....done

// web服务器的信息
Server Software:        
Server Hostname:        192.168.188.6
Server Port:            8080


Document Path:          /distributeLock  // 请求的URL
Document Length:        14 bytes  // http响应正文长度

Concurrency Level:      10    // 并发请求数
Time taken for tests:   0.153 seconds  //整个测试持续的时间
Complete requests:      100  // 完成的请求数
Failed requests:        0  //失败的请求数
Total transferred:      14700 bytes  // 全部网络数据传输量 
HTML transferred:       1400 bytes  // 全部html正文数据量
Requests per second:    652.40 [#/sec] (mean) // 每秒请求数 == Complete requests / Time taken for tests
Time per request:       15.328 [ms] (mean) // 用户平均请求等待时间 == Time taken for tests / (Complete requests /Concurrency Level)
Time per request:       1.533 [ms] (mean, across all concurrent requests) // 服务器平均请求处理时间 == Time taken for tests / Complete requests 
Transfer rate:          93.66 [Kbytes/sec] received //平均每秒网络上的流量 == Total transferred / Time taken for tests

// 连接的每个阶段花费的时间
Connection Times (ms) 
                min  mean[+/-sd] median   max
Connect:         0     4   2.9     3      10
Processing:      3    11   7.0     9      65
Waiting:         3     8   6.7     7      65
Total:           6    15   7.0    14      68

// 每个请求处理时间的分布情况
Percentage of the requests served within a certain time (ms)
  50%     14
  66%     15
  75%     16
  80%     17
  90%     20
  95%     22
  98%     32
  99%     68
 100%     68 (longest request)