You may well be tired of downtime and looking to optimize Apache and Mysql for your server.

Use the below steps,

Configure   Apache to use  mpm_prefork Module using easypache

vi  /usr/local/apache/conf/httpd.conf

Search for  <IfModule prefork.c>

In this add the below parameters,

ServerLimit 1000
KeepAlive On
KeepAliveTimeout 60
MaxClients 1500

MaxSpareServers 200

MinSpareServers 50

</ifmodule>

Run the below command to keep the cpanel from over writing the apache configuration.

/usr/local/cpanel/bin/apache_conf_distiller –update

service httpd restart

Well you are done with apache optimization

There maybe many more optimization but this is a general one.