On Tue, Aug 30, 2011 at 10:39 AM, Scott Marlowe <scott.marlowe@xxxxxxxxx> wrote: > 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 > I have experienced such behaviour on Ubuntu 64bit OS but not on Fedora 64bit OS. Try installing Fedora on a test machine and see if you run into the high memory consumption problem(s). Allan. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
