Hello, I have tried to install xcache and APC on CentOS 5.4. I'm not having any luck. I've tried xcache using this howto. I receive errors for http://www.howtoforge.com/xcache-php5-apache2-fedora8-centos5.1 after I do a make. I've tried installing APC using http://2bits.com/articles/installing-php-apc-gnulinux-centos-5.html which seems like it would be very easy, but I can't seem to get it to work either. When I enable apc in the apc.ini file, apache fails to load php. No errors in the logs, but when I hit a php page I only get a blank white page. So my question is...is there an PHP optimizer that is easy to install and maintain? Is there some "trick" to install any of them on Centos5.4? Thanks! Tfunky