WORKER Is Better than PREFORK

Prefork is supposed to generally be better for single or dual cpu systems, and worker is supposed to be generally better for multi-CPU systems

IfModule mpm_prefork_module
————————–

StartServers 5
MinSpareServers 5
MaxSpareServers 10
MaxClients 150
MaxRequestsPerChild 0

IfModule mpm_worker_module
—————————

StartServers 2
MaxClients 150
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0

PHP5 can work with MPM Worker too. But you have to use CGI or FastCGI instead of Apache module