a few suggestions:
1. if possible, build php 5.3.2 instead of 5.2.x. 5.3.2 using --with-mysql=mysqlnt --with-mysqli=mysqlnt
2.install eAccelerator 0.9.6.1 if not yet -- this will reduce CPU load
3.install wordpress super-cache
if you mainly run wp, no other account on your VPS, then can install other opcode cache -- like APC, XCache as well. in either case be sure to disable php suExec so you can use shared memory to store opcode cache.
Last edited by NiteWave; 07-16-2010 at 04:25 AM..