1.yum install -y httpd-tools
ab命令被集成到了httpd服务器中,所以想要使用ab命令需要先安装httpd服务
ab -c 并发请求HTTP报文数量 -n 总共发送少个请求报文 http://www.oldboy.com/index,html
ab命令的使用方法和常用选项 ab [选项] [http[s]://]hostname[:port]/path 常用选项: -n requests Number of requests to perform
在测试会话中所执行的请求总个数,默认一个
-c concurrency Number of multiple requests to make at a time
一次产生的请求个数,默认一个
注意: 用Linux 做测试要做做好域名解析
vim /etc/hosts
10.0.0.7
2. 实例
[root@web01 conf.d]# ab -c 200 -n 200 http://www.oldboy.com/index.html This is ApacheBench, Version 2.3 <$Revision: 1430300 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking www.oldboy.com (be patient) Completed 100 requests Completed 200 requests Finished 200 requests Server Software: nginx/1.14.1 ---被测试的httpd服务器版本 Server Hostname: www.oldboy.com ---服务器主机名 Server Port: 80 ---服务器端口 Document Path: /index.html ---测试的文档页面 Document Length: 195 bytes ---测试的文档大小 Concurrency Level: 200 ---并发数 Time taken for tests: 2.746 seconds ---整个测试时间 Complete requests: 200 ---完成请求个数 Failed requests: 118 ---失败请求格式 (Connect: 0, Receive: 0, Length: 118, Exceptions: 0) Write errors: 0 Non-2xx responses: 200 Total transferred: 104236 bytes ---整个测试过程中总传输字节数 HTML transferred: 39118 bytes ---整个测试过程中HTML传输字节数 Requests per second: 72.82 [#/sec] (mean) ---每秒处理请求数,mean 表示这是一个平均值 Time per request: 2746.492 [ms] (mean) ---平均请求时间,mean表示这是一个平均值 Time per request: 13.732 [ms] (mean, across all concurrent requests) ---每个请求实际运行时间的平均值,mean表示这是一个平均值 Transfer rate: 37.06 [Kbytes/sec] received ---传输速率 Connection Times (ms) min mean[+/-sd] median max Connect: 254 266 7.0 266 277 Processing: 256 453 217.6 400 1816 Waiting: 256 453 217.6 400 1816 Total: 511 718 217.0 668 2074 Percentage of the requests served within a certain time (ms) 50% 668 66% 689 75% 712 80% 968 90% 992 95% 1112 98% 1250 99% 1358 100% 2074 (longest request)
3. 注意
测试上限一般是由打开文件的数量决定的,这个数值可以通过ulimit -a或ulimit -n命令查看,默认大小为1024。解决办法就是ulimit -n [数值],来提高打开文件的数量上限,测试和被测试的都要提升。