تو اینجا رو ادیت کن usr/local/apache/conf/includes/pre_virtualhost_global.conf

<IfModule prefork.c>
MaxSpareServers 100
MinSpareServers 50
StartServers 100
ServerLimit 1000
MaxClients 1000
KeepAlive 10
KeepAliveTimeout 3
</IfModule>