1.在Mac中配置Apacheweb
①启动Apache,打开终端apache
sudo apachectl -v
以下显示Apache的版本浏览器
sudo apachectl start
这样Apache就启动了。打开Safari浏览器地址栏输入 “http://localhost”,能够看到内容为“It works!”的页面服务器
②设置虚拟端终机并发
打开Apache的配置文件ide
sudo vi /etc/apache2/httpd.conf
在httpd.conf中找到“#Include /private/etc/apache2/extra/httpd-vhosts.conf”,去掉前面的“#”,保存并退出,去掉这一行的#意思是从/extra/httpd-vhosts.conf这个文件导入虚拟主机配置。3d
#Include /private/etc/apache2/extra/httpd-vhosts.conf
而后重启Apacherest
sudo apachectl restart
运行以下命令:code
sudo vi /etc/apache2/extra/httpd-vhosts.conf
就打开了配置虚拟主机文件httpd-vhost.conf,配置虚拟主机了。须要注意的是该文件默认开启了两个做为例子的虚拟主机:blog
<VirtualHost *:80> ServerAdmin webmaster@dummy-host.example.com DocumentRoot "/usr/docs/dummy-host.example.com" ServerName dummy-host.example.com ErrorLog "/private/var/log/apache2/dummy-host.example.com-error_log" CustomLog "/private/var/log/apache2/dummy-host.example.com-access_log" common </VirtualHost> <VirtualHost *:80> ServerAdmin webmaster@dummy-host2.example.com DocumentRoot "/usr/docs/dummy-host2.example.com" ServerName dummy-host2.example.com ErrorLog "/private/var/log/apache2/dummy-host2.example.com-error_log" CustomLog "/private/var/log/apache2/dummy-host2.example.com-access_log" common </VirtualHost>
须要增长以下配置:
<VirtualHost *:80> DocumentRoot "/Library/WebServer/Documents" ServerName localhost ErrorLog "/private/var/log/apache2/localhost-error_log" CustomLog "/private/var/log/apache2/localhost-access_log" common </VirtualHost> <VirtualHost *:80> DocumentRoot "/Users/snandy/work" ServerName mysites ErrorLog "/private/var/log/apache2/sites-error_log" CustomLog "/private/var/log/apache2/sites-access_log" common <Directory /> Options Indexes FollowSymLinks MultiViews AllowOverride None Order deny,allow Allow from all </Directory> </VirtualHost>
保存并退出
:wq sudo apachectl restart
2.配置完成以后进行压测
ab -n 4 -c 2 https://www.baidu.com/
-n后面的是请求数
-c后面的是并发数
①Requests per second 吞吐率
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
②Concurrency Level 并发用户数
要注意区分这个概念和并发链接数之间的区别,一个用户可能同时会产生多个会话,也即链接数。在HTTP/1.1下,IE7支持两个并发链接,IE8支持6个并发链接,FireFox3支持4个并发链接,因此相应的,咱们的并发用户数就得除以这个基数。
③Time per request 用户平均请求等待时间
计算公式:处理完成全部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)
④Time per request:across all concurrent requests 服务器平均请求等待时间
计算公式:处理完成全部请求数所花费的时间/总请求数,即: Time taken for/testsComplete requests