On Tue, Aug 30, 2011 at 12:54 AM, Florian Weimer <fweimer@xxxxxx> wrote: > * 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. 48 core AMD Magny Cours. I also had to turn off zone reclaim mode on it or it would slow to a crawl as the OS started to cache more and more data. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
