Re: Performance Monitoring Software?

From: John-Paul Stewart (jpstewart_at_sympatico.ca)
Date: 08/09/03 

Date: Sat, 09 Aug 2003 11:16:38 -0400

"David P. Donahue" wrote:
>
> Anybody have any recommendations for software (freeware, ideally) that
> monitors system performance and resource utilization and generates logs (and
> graphs) over time? CPU usage, memory usage, etc. Also, if it can track
> which processes tend to hog the resources and such, that would be perfect.

Have you looked into 'sar'? It gathers *tons* of statistics on just
about every imaginable aspect of performance.

You'll need some scripts and something like gnuplot to make graphs out
of the output. There might be some ready-made ones you can find on the
Net.

'sar' won't directly track which processes are resource hogs, but can
give per-process statistics if you supply the PID. (Note that most
daemons log their PID in a file, so you could 'cat' that into in the
command line to get stats on, say, Apache.)

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