[CLUE-Tech] Stress testing

[Chris K. Chew]

I agree.  Faulty power can also cause these kind of symptoms.  But, then
again, so can a dying hard drive.

Try some of these utilities to see if you can find anything (be sure and use
each while idle AND under load):

vmstat -- memory and process stats
sar -- part of the sysstat family
bonnie -- disk IO performance
lmbench -- all kinds of metrics
top -- ps on steroids

You can find all of these at www.freshmeat.net or www.linux.org/apps if you
don't already have them.

What kinds of things is the server doing?  Is it doing heavy disk
reading/writing (e.g. db transactions), or lots of swapping memory (e.g.
compiling), lots of network traffic but little disk usage, or what?

good luck,

Chris

-----Original Message-----
From: clue-tech-admin at clue.denver.co.us
[mailto:clue-tech-admin at clue.denver.co.us]On Behalf Of Dan Harris
Sent: Wednesday, January 16, 2002 3:11 PM
To: clue-tech at clue.denver.co.us
Subject: Re: [CLUE-Tech] Stress testing


The first thing I would check is hardware.  Are your CPU's overheating?  Are
you using dusty ram that was sitting in a closet somewhere? :)  Seriously,
thermal issues will cause these symptoms.  Pull of the heat sinks on the
CPU's and put some quality thermal grease in there, add a fan, etc..

-Dan

<quote who="MaziFarhang">
> Hi all,
>
> This is my first post, so please bear with me.  I am running a few
> machines with RH7.1 and I am having problems with one of them.  It
> freezes when it is put under a consistent (rather heavy) load.  The
> other machines, with the same type of setup, seem to do OK.  The
> problem is that I am not sure what component is actually causing the
> lockup.  I can't find anything in any of the logs that would give my
> some clue.  The screen also goes dead, so there is no info there.
>
> I was wondering whether there was a suite of tests available
> (preferably at little or no cost!!) whereby I would be able to test the
> various components of my system for failure.  I am mostly suspicious of
> the hard drive.
>
> Any help would be appreciated.
>
> Mazi Farhang
> TopoWeb.


-Dan


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