Ref: http://httpd.apache.org/docs/2.2/mod/prefork.html Ref:http://www.devside.net/articles/apache-performance-tuning Ref:http://en.wikipedia.org/wiki/Slowloris Sample Configuration for prefork setting <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 </IfModule> StartServers : The StartServers directive sets the number of child server processes created on startup. So after restart the apache if we take a snapshot of how many process is running [root@mail extra]# [...]