I am getting some fairly sever performance issues with my plesk 11 dedicated box, it has 8 gigs of ram, static pages load very fast, a firstbyte time of less then 0.5 seconds, however dynamic php files, including just a php info can take between 1 (straight after a httpd restart) and 10 seconds for the firstbyte.
Ive been measuring the performance with WebPagetest.org
The server runs 1 site, with 4000 visitors a month, it should not be under any real load.
PHP runs as CGI
Heres the httpd configuration for prefork
<IfModule prefork.c> StartServers 8 MinSpareServers 5 MaxSpareServers 20 ServerLimit 256 MaxClients 256 MaxRequestsPerChild 1000 </IfModule>
Also the log files fill with this
[Tue Apr 09 05:58:23 2013] [warn] mod_fcgid: process 4435 graceful kill fail, sending SIGKILL [Tue Apr 09 05:58:55 2013] [warn] mod_fcgid: process 4466 graceful kill fail, sending SIGKILL [Tue Apr 09 05:59:11 2013] [warn] mod_fcgid: process 4475 graceful kill fail, sending SIGKILL
Any suggestions are more then welcome, i cannot figure this out.