发布网友 发布时间:2022-02-26 23:47
共1个回答
热心网友 时间:2022-02-27 01:16
nginx以高并发,省内存著称。
相信大多数安装nginx的同学都想知道自己的nginx性能如何。
我想跟大家分享下我使用ab工具的压力测试方法和结果,
ab是针对apache的性能测试工具,可以只安装ab工具。
ubuntu安装ab
apt-get install apache2-utils
centos安装ab
yum install httpd-tools
测试之前需要准备一个简单的html、一个php、一个图片文件。
分别对他们进行测试。
我们把这个三个文件放到nginx安装目录默认的html目录下,
准备之后我们就可以测试了
ab -kc 1000 -n 1000 http://localhost/ab.html
这个指令会使用1000个并发,进行连接1000次。结果如下
root@~# ab -kc 1000 -n 1000 http://www.nginx.cn/ab.html
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking www.nginx.cn (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests
Server Software: nginx/1.2.3
Server Hostname: www.nginx.cn
Server Port: 80
Document Path: /ab.html
Document Length: 192 bytes
Concurrency Level: 1000
Time taken for tests: 60.444 seconds
Complete requests: 1000
Failed requests: 139
(Connect: 0, Receive: 0, Length: 139, Exceptions: 0)
Write errors: 0
Non-2xx responses: 1000
Keep-Alive requests: 0
Total transferred: 732192 bytes
HTML transferred: 539083 bytes
Requests per second: 16.54 [#/sec] (mean)
<strong>Time per request: 60443.585 [ms] (mean)
Time per request: 60.444 [ms] (mean, across all concurrent requests)</strong>
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Connection Times (ms)
min mean[+/-sd] median max
Connect: 55 237 .6 261 328
Processing: 58 5375 13092.8 341 60117
Waiting: 57 5337 12990.0 341 59870
Total: 386 5611 13083.7 572 60443
Percentage of the requests served within a certain time (ms)
50% 572
66% 606
75% 635
80% 672
90% 30097
95% 42004
98% 47250
99% 49250
100% 60443 (longest request)
对于php文件和图片文件可以使用同样指令进行,结果我就不贴出来了。
ab -kc 500 -n 5000 http://localhost/ab.php
ab -kc 500 -n 5000 http://localhost/ab.gif
输出结果我们可以从字面意思就可以理解。
这里对两个比较重要的指标做下说明
比如
Requests per second: 16.54 [#/sec] (mean)
Time per request: 60443.585 [ms] (mean)
Requests per second: 16.54 [#/sec] (mean)
表示当前测试的服务器每秒可以处理16.54个静态html的请求事务,后面的mean表示平均。这个数值表示当前机器的整体性能,值越大越好。
Time per request: 60443.585 [ms] (mean)
单个并发的延迟时间,后面的mean表示平均。
隔离开当前并发,单独完成一个请求需要的平均时间。
顺带说一下两个Time per request区别
Time per request: 60443.585 [ms] (mean)
Time per request: 60.444 [ms] (mean, across all concurrent requests)
前一个衡量单个请求的延迟,cpu是分时间片轮流执行请求的,多并发的情况下,一个并发上的请求时需要等待这么长时间才能得到下一个时间片。
计算方法Time per request: 60.444 [ms] (mean, across all concurrent requests)*并发数
通俗点说就是当以-c 10的并发下完成-n 1000个请求的同时,额外加入一个请求,完成这个求平均需要的时间。
后一个衡量性能的标准,它反映了完成一个请求需要的平均时间,在当前的并发情况下,增加一个请求需要的时间。
计算方法Time taken for tests: 60.444 seconds/Complete requests: 1000
通俗点说就是当以-c 10的并发下完成-n 1001个请求时,比完成-n1000个请求多花的时间。
你可以适当调节-c 和-n大小来测试服务器性能,借助htop指令来直观的查看机器的负载情况。