[Techtalk] Performance monitoring

[jennyw]

I was wondering if people had suggestions for performance monitoring tools. In 
particular, I'm looking for something like top but which includes history, and also 
information on all the running processes (or at least the number of running 
processes).

Also, I'm looking for something that can run on a server (no X, not even client). 
So if there's something that will run as an agent that has a GUI I could run on 
another system, that would be great. Something that would display info on a Web 
page might be even better. MRTG is a possibility, but in an earlier performance 
monitoring thread on techtalk, someone mentioned that because it's getting info 
through SNMP, it would have trouble getting accurate readings on processor 
utilization.

Thanks!

Jen