On 3 November 2012 12:09, Gunnar "Nick" Bluth <gunnar.bl...@pro-open.de>wrote:
> Am 03.11.2012 16:20, schrieb Petr Praus: > > > Your CPUs are indeed pretty oldschool. FSB based, IIRC, not NUMA. A >> process migration would be even more expensive there. >> >> > Ok, I've actually looked these up now... at the time these were current, I > was in the lucky situation to only deal with Opterons. And actually, with > these CPUs it is pretty possible that Scott Marlowe's hint (check > vm.zone_reclaim_mode) was pointing in the right direction. Did you check > that? > I did check that, it's zero. I responded to his message, but my messages to the mailing list are getting delayed by ~24 hours because somebody has to always bless them. > > > Yes, same behaviour. I let the shared_buffers be the default (which >> is 8MB). With work_mem 1MB the query runs fast, with 96MB it runs slow >> (same times as before). It really seems that the culprit is work_mem. >> > > > Well, I'm pretty sure that having more work_mem is a good thing (tm) > normally ;-) > Well, that's what I always thought too! :-) > -- > Gunnar "Nick" Bluth > RHCE/SCLA > > Mobil +49 172 8853339 > Email: gunnar.bl...@pro-open.de > __________________________________________________________________________ > In 1984 mainstream users were choosing VMS over UNIX. Ten years later > they are choosing Windows over UNIX. What part of that message aren't you > getting? - Tom Payne > >
