swappiness is something else, it's good to set it at 0 when you have enough RAM to fit everything but it will still swap when you run out if it and it will be a big hit.
I would advise monitoring the cluster, or at least very least look at the output of the "top" command while the job is running. Used swap should be at 0 with swappiness=0, unless you ran out of RAM. J-D On Fri, Jul 30, 2010 at 11:06 AM, Steve Kuo <[email protected]> wrote: > GC paused of 5 minutes seems to be my bane. I disable swapping > > sysctl -A |grep swap > vm.swappiness = 0 > > so I assume Java heap is not swapped out. How do one check whether swapping > is on for a particular Java process. >
