CPU usage goes way up on 5.1 when memory is added

Kris Kennaway kris at obsecurity.org
Fri Jan 23 15:57:11 PST 2004


On Fri, Jan 23, 2004 at 06:07:20PM -0500, Richard G. Roberto wrote:
> Hi,
> 
> I've been running 5.1-RELEASE for quite some time on my dual PIII 333Mhz
> Micron PC with 384MB of RAM and 670MB of swap.  Its a little low on memory
> for what I'm now doing with it though, so I added 256MB of RAM.  The new
> RAM gets recognized, and there are no obvious errors on the console or in
> the logs, but every little thing drives the CPU utilization through the
> roof and the system is unusable.  Even just typing "man ls" triggers it,
> never mind trying to run ssh.  I remove the RAM, and it goes back to
> normal.

How are you trying to measure this?  Have you tried reverting to a
GENERIC kernel to isolate one of your non-default options that may be
causing the problem (or measurement artefact)?

Kris
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