server performance assessment/adjustment

Hi All,

I have some quirky variable performance issues on a FMS 9 box under
winxp, and apart from the baseline ram/hd parameters, what options in
FMS settings can I adjust to maximize performance? How far does one up
the cache...

The server currently has no real users other than myself, in testing
phase (both myself and server). I guess I am looking for a progressive
strategy, assuming that this must be a common methodology, or some way
to quantitatively assess performance.