Server metrics

[VG Ops]

Does anyone know of a great way to produce server metrics.... eg to 
measure how much cpu/bandwidth is used per server/player.

I'm not interested in what other peoples results are; I've got a pretty 
good idea what we have here. I'm just interested in how people measured 
it and how rough or accurate they are. Any tools or scripts?

I'd *like* to get good statistics of the usage. Average requirements, 
variance, error margin.

John