Hi Prentice,
> On 7 Feb 2015, at 9:35 am, Prentice Bisbal <[email protected]> > wrote: > > Do any of you disable swap on your compute nodes? > > I brought this up in a presentation I gave last night on HPC system > administration, but realized I never actually did this, or know of anyone who > has. I would tweak the vm.overcommit_memory setting, but that's not the same > as disabling swap altogether. I'd like to try doing this in the future, but I > prefer to learn from someone else's mistakes first. Yeah, I don't think it's a good idea to disable swap entirely, I believe there was an article on one of the Linux magazines a few years back suggesting that at least some swap is an essential part of Linux memory management. Typically we keep it low, and as you suggested, use the vm.overcommit_memory, and also vm.swappiness to make sure that it only uses the swap when to do otherwise would be to crash the machine. This might be a good article to read http://www.linuxjournal.com/article/10678 Matt. _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
