No, I've had it happen with NUMA turned off. The NUMA issues are with zone_reclaim_mode. If you have it set to 1 (default on a lot of big machines) it can cause serious problems with performance as well.
On Fri, Apr 12, 2013 at 3:21 PM, Claudio Freire <klaussfreire@xxxxxxxxx> wrote:
On Fri, Apr 12, 2013 at 6:15 PM, Scott Marlowe <scott.marlowe@xxxxxxxxx> wrote:Isn't that a NUMA issue?
> The really messed up bit is that the problems with the kswapd won't show up
> for weeks, months, or sometimes even longer. The symptoms of a kswapd
> problem is that swap is mostly full, but there's LOTS of free memory /
> kernel cache, and the kswapd is busily swapping in / out. Page faults
> skyrocket and the problem can last for a few minutes or a few hours, then
> clear up and not occur again for a long time.
To understand recursion, one must first understand recursion.
