webbench在linux下的安装教程
一、下载Webbench
使用wget或windows下载好导入linux也行，地址：http://home.tiscali.cz/cz210552/distfiles/webbench-1.5.tar.gz
二、编译安装webbench：
复制代码 代码示例:
root@jack-desktop:~/software# tar xvzf webbench-1.5.tar.gz
root@jack-desktop:~/software/webbench-1.5# make
cc -Wall -ggdb -W -O -c -o webbench.o webbench.c
webbench.c: In function ‘alarm_handler’:
webbench.c:77: warning: unu
sed parameter ‘signal’
cc -Wall -ggdb -W -O -o webbench webbench.o
ctags *.c
root@jack-desktop:~/software/webbench-1.5# make install
install -s webbench /usr/local/bin
install -m 644 webbench.1 /usr/local/man/man1
install -d /usr/local/share/doc/webbench
install -m 644 debian/copyright /usr/local/share/doc/webbench
install -m 644 debian/changelog /usr/local/share/doc/webbench
root@jack-desktop:~/software/webbench-1.5#
root@jack-desktop:~/software/webbench-1.5# web
webbench webs
安装成功
三，查看webbench帮助文档
复制代码 代码示例:
root@jack-desktop:~/software/webbench-1.5# webbench --help
webbench [option]... URL
-f|--force Don't wait for reply from server.
-r|--reload Send reload request - Pragma: no-cache.
-t|--time <sec> Run benchmark for <sec> seconds. Default 30.
-p|--proxy <server:port> Use proxy server for request.
-c|--clients <n> Run <n> HTTP clients at once. Default one.
-9|--http09 Use HTTP/0.9 style requests.
-1|--http10 Use HTTP/1.0 protocol.
-2|--http11 Use HTTP/1.1 protocol.
--get Use GET request method.
--head Use HEAD request method.
--options Use OPTIONS request method.
--trace Use TRACE request method.
-?|-h|--help This information.
-V|--version Display program version.
root@jack-desktop:~/software/webbench-1.5#
webbench网站压力测试：
复制代码 代码示例:
root@jack-desktop:~/software/webbench-1.5# webbench -c 100 http://localhost:12345/test
Webbench - Simple Web Benchmark 1.5
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.
Benchmarking: GET http://localhost:12345/test
100 clients, running 30 sec.
Speed=495888 pages/min, 586798 bytes/sec.
Requests: 247944 susceed, 0 failed.
并发100个，运行30s，访问请求全部成功，速度495888 pages/min, 586798 bytes/sec
复制代码 代码示例:
root@jack-desktop:~/software/webbench-1.5# webbench -c 1000 http://localhost:12345/test
Webbench - Simple Web Benchmark 1.5
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.
Benchmarking: GET http://localhost:12345/test
1000 clients, running 30 sec.
Speed=414996 pages/min, 490915 bytes/sec.
Requests: 207430 susceed, 68 failed.
并发1000个，运行30s，访问68个失败，速度也慢下来了，414996 pages/min, 490915 bytes/sec
在并发很大时服务器占用资源很厉害，主要是CPU占用过多，有时达到80%以上！
总结：
1、压力测试工作应该放到产品上线之前，而不是上线以后
2、测试时尽量跨公网进行，而不是内网
3、测试时并发应当由小逐渐加大，比如并发100时观察一下网站负载是多少、打开是否流程，并发200时又是多少、网站打开缓慢时并发是多少、网站打不开时并发又是多少
4、应尽量进行单元测试，如B2C网站可以着重测试购物车、推广页面等，因为这些页面占整个网站访问量比重较大
