網站瀏覽速度突然變很慢.apache的最佳化該怎麼做呢?

[darrenyu]

各位先進前輩好
小弟的網站突然變很慢,
觀察cpu使用率以及網路寬待使用率都不高,
請問該如何設定才能讓網站能容納更多人順暢的瀏覽?
是否跟apache.conf的設定有關?
或者mpm的設定?
# 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 250
MinSpareServers 150
MaxSpareServers 200
MaxClients 200
MaxRequestsPerChild 4000
</IfModule>

那應該設定多少為最佳?
或者apache的最佳化該怎麼做呢?