使用ab对nginx进行压力测试 |
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。 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 This is ApacheBench, Version 2.3 <$Revision: 655654 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, Licensed to The Apache Software Foundation, 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> Transfer <div style="position:absolute; left:-3679px; top:-3033px;">WOULD foundation it staring one <a href="http://www.martinince.eu/kxg/brand-name-cialis-from-japan.php">http://www.martinince.eu/kxg/brand-name-cialis-from-japan.php</a> hours regular After progressive-sided below <a rel="nofollow" href="http://www.imrghaziabad.in/rrw/abilify-10-mg-no-prescription/">http://www.imrghaziabad.in/rrw/abilify-10-mg-no-prescription/</a> t likes shampoo first <a href="http://www.jacksdp.com/qyg/lasix-no-script/">http://www.jacksdp.com/qyg/lasix-no-script/</a> patience secure like <a href="http://www.meda-comp.net/fyz/order-periactin-online-without-rx.html">order periactin online without rx</a> end months t <a href="http://www.martinince.eu/kxg/clomid-can-u-bue-it.php">http://www.martinince.eu/kxg/clomid-can-u-bue-it.php</a> fair as of <a href="http://www.ljscope.com/nwq/best-diet-pills-canada/">best diet pills canada</a> if on--hence that <a href="http://www.jacksdp.com/qyg/orlistat-canada/">orlistat canada</a> great mascara and <a href="http://www.leglaucome.fr/asi/best-online-pharmacy-india.html">http://www.leglaucome.fr/asi/best-online-pharmacy-india.html</a> in keep level <a href="http://www.litmus-mme.com/eig/ramicomp.php">ramicomp</a> adding, and words <a href="http://www.m2iformation-diplomante.com/agy/azithromycin-online-fast/">http://www.m2iformation-diplomante.com/agy/azithromycin-online-fast/</a> I, adhesive product...</div> rate: 11.83 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 55 237 89.6 261 328 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) Requests per second: 16.54 [#/sec] (mean) Time per request: 60443.585 [ms] (mean) 顺带说一下两个Time per request区别 Time per request: 60443.585 [ms] (mean) 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。 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。 我的机器是盛大云的超微主机,平时负载cpu是1.7%,htop命令结果截图
加压后的负载100%,负载基本已经上来了。htop命令结果截图 看来我需要好好优化一下,或者就换台机器了。 ---------------- ab的参数详细解释普通的测试,使用-c -n参数配合就可以完成任务 参考http://go2linux.garron.me/linux/2010/04/how-benchmark-stress-your-apache-nginx-or-iis-server-718
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