压力测试工具Apache Bench
作者:互联网
1:吞吐率(Requests per second)
服务器并发处理能力的量化描述,单位是reqs/s,指的是某个并发用户数下单位时间内处理的请求数。某个并发用户数下单位时间内能处理的最大请求数,称之为最大吞吐率。
记住:吞吐率是基于并发用户数的。这句话代表了两个含义,1:吞吐率和并发用户数相关;2:不同的并发用户数下,吞吐率一般是不同的。
计算公式:总请求数 / 处理完成这些请求数所花费的时间,即
Request per second = Complete requests / Time taken for tests
2:并发连接数(The number of concurrent connections)
并发连接数指的是某个时刻服务器所接受的请求数目,简单的讲,就是一个会话。
3:并发用户数(The number of concurrent users,Concurrency Level)
要注意区分这个概念和并发连接数之间的区别,一个用户可能同时会产生多个会话,也即连接数。在HTTP/1.1下,IE7支持两个并发连接,IE8支持6个并发连接,FireFox3支持4个并发连接,所以相应的,我们的并发用户数就得除以这个基数。
4:用户平均请求等待时间(Time per request)
计算公式:处理完成所有请求数所花费的时间/ (总请求数 / 并发用户数),即
Time per request = Time taken for tests /( Complete requests / Concurrency Level)
5:服务器平均请求等待时间(Time per request: across all concurrent requests)
计算公式:处理完成所有请求数所花费的时间 / 总请求数,即
Time taken for / testsComplete requests
可以看到,它是吞吐率的倒数。
同时,它也=用户平均请求等待时间/并发用户数,即
Time per request / Concurrency Level
官网下载地址:https://www.apachelounge.com/download/
下载后解压,用cmd进入当前的项目解压目录:
然后进入shell命令的执行界面(进入到bin目录下):
测试命令:
./ab -n 100 -c 10 http://localhost:8085/linewell/test1/pass/testApacheBench.do
输出:
This is ApacheBench, Version 2.3 <$Revision: 1843412 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking localhost (be patient).....done Server Software: Server Hostname: localhost Server Port: 8085 Document Path: /linewell/test1/pass/testApacheBench.do Document Length: 0 bytes Concurrency Level: 10 Time taken for tests: 0.077 seconds Complete requests: 100 Failed requests: 0 Non-2xx responses: 100 Total transferred: 9200 bytes HTML transferred: 0 bytes Requests per second: 1299.09 [#/sec] (mean) Time per request: 7.698 [ms] (mean) Time per request: 0.770 [ms] (mean, across all concurrent requests) Transfer rate: 116.72 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 0 0.3 0 1 Processing: 1 5 3.4 5 27 Waiting: 1 4 3.1 4 26 Total: 2 5 3.4 5 27 Percentage of the requests served within a certain time (ms) 50% 5 66% 6 75% 7 80% 7 90% 9 95% 11 98% 11 99% 27 100% 27 (longest request)
输出结果解析:
标签:请求,并发,per,Bench,Apache,Time,测试工具,requests,用户数 来源: https://www.cnblogs.com/chenmz1995/p/12579987.html