I've tried running without swap and the problem is if you actually do run out of memory then the process killer can take out your postgresql.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. Sim |
