apache优化列表
apache限制ip连接数
首先，执行
#apt-get install libapache-mod-limitipconn
然后nano /etc/apache/httpd.conf
先找到这一行
#ExtendedStatus On
查看是否被注释了，如果是的话，去掉注释
再查找这个字符串mod_limitipconn.so
如果没找到任何记录,就在任何位置添加以下一行
LoadModule limitipconn_module modules/mod_limitipconn.so
然后就可以做限制了
对全局进行限制的话，就直接加入
<IfModule mod_limitipconn.c>
<Location />
MaxConnPerIP 3 #每ip最多3个连接
NoIPLimit image/* #对图片不限制
</Location>
</IfModule>
如果你只想设置某个虚拟主机的连接限制，就把上面的那段放入
<VirtualHost>
</VirtualHost>
之中
如果只想限制某个目录的文件就可以这样
<Location /mp3>
MaxConnPerIP 1 #限制1个连接
# In this case, all MIME types other than audio/mpeg and video*
# are exempt from the limit check
OnlyIPLimit audio/mpeg video #只限制audio/mpeg video文件,如MP3呀WMA呀这种文件后缀名
</Location>
修改apache最大连接数
# prefork MPM
# StartServers ……… number of server processes to start
# MinSpareServers …… minimum number of server processes which are kept spare
# MaxSpareServers …… maximum number of server processes which are kept spare
# MaxClients ……….. maximum number of server processes allowed to start
# MaxRequestsPerChild .. maximum number of requests a server process serves
<IfModule prefork.c>
StartServers 5
MinSpareServers 5
MaxSpareServers 10
MaxClients 20
MaxRequestsPerChild 0
</IfModule>
# pthread MPM
# StartServers ……… initial number of server processes to start
# MaxClients ……….. maximum number of server processes allowed to start
# MinSpareThreads …… minimum number of worker threads which are kept spare
# MaxSpareThreads …… maximum number of worker threads which are kept spare
# ThreadsPerChild …… constant number of worker threads in each server process
# MaxRequestsPerChild .. maximum number of requests a server process serves
<IfModule worker.c>
StartServers 2
MaxClients 150
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0
</IfModule>
注意，如果不知道自己的apache2使用哪种工作模式，最简单的方法，先restart一下apache2，然后netstat -t 看看有几个apache2的进程，然后对比一下就可以了
ps:
apache2默认最大256连接，如果需要更大，自己手动编译
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