CPU load locks up box. Apache or MYSQL related.

[drewb0y]

I was doing some more reading on this and it seems that of the 3 accelerators, APC is about right in the middle performance wise but comes out way on top stability and future support wise.

http://stackoverflow.com/questions/9...ator-vs-xcache
http://2bits.com/articles/benchmarki...ng-drupal.html
http://2bits.com/articles/benchmarki...-compared.html
http://www.scribd.com/doc/88689/apcfacebook

Apparently facebook uses APC and also contributes code back to the project which pretty much settles it for me.

Install was only 2 steps (OK 3 if you count restarting Apache)

apt-get install php-apc

vi /etc/php5/conf.d/apc.ini

add the following to apc.ini

extension=apc.so
apc.enabled=1
apc.shm_size=30

Restart apache and done.