Re: heavy swapping, not sure why

* Scott Marlowe:

> On a machine with lots of memory, I've run into pathological behaviour
> with both the RHEL 5 and Ubuntu 10.04 kernels where the kswapd starts
> eating up CPU and swap io like mad, while doing essentially nothing.
> Setting swappiness to 0 delayed this behaviour but did not stop it.
> Given that I'm on a machine with 128G ram, I just put "/sbin/swapoff
> -a" in /etc/rc.local and viola, problem solved.

Was this NUMA machine?  Some older kernels can only migrate pages
between nodes through swap.

--
Florian Weimer                <fweimer@bfk.de>
BFK edv-consulting GmbH       http://www.bfk.de/
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