[ILUG] system monitoring and logging s/w

[McAuley, Tim]

Hiya,

I'm looking for some software to measure and log the performance of a linux
server. I know there are a variety of tools available, but is there anything
that will pull them altogether, and hopefully generate viewable statistics?

The main purpose of this is to identify bottle necks for a system, and also
to see how a particular system is coping within a load balanced network.
Particular items I'm looking for are:

cpu load, usage, idle time etc... 
memory/swap usage
disk i/o
(network traffic maybe)
ability to track specific processes/programs to identify their cpu and mem
usages.

all of this preferably in graph format, and with a configurable time period
- 5 mins to 5 weeks etc... (every sec to every 1/2 hour).

I know you can do all this manually, but I need something that will run in
the background and you can look at the report at the end of a 1 hour test or
at the end of a weeks standard usage.

Being as unobtrusive as possible, to the system's performance, is of course
a must. It would also be nice to have as much data logged as possible, so
that you can rearrange the production of stats reports if required. It's
fine for the program to run on the server itself (even preferable, to reduce
network load), just as long as the data generated can be retrieved.

It doesn't have to be GPL (but it would be nice), so any good commercial
options can also be considered.

Any ideas?

Having looked at http://www.linuxlinks.com/Software/Monitoring/Load/, and
browsed a bit, nothing as really struck me yet as being what I need.

THANKS!

Tim