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Re: [PERFORM] Releasing memory during External sorting?
- From: Simon Riggs <simon(at)2ndquadrant(dot)com>
- To: Ron Peacetree <rjpeace(at)earthlink(dot)net>
- Cc: pgsql-hackers(at)postgresql(dot)org, pgsql-performance(at)postgresql(dot)org
- Subject: Re: [PERFORM] Releasing memory during External sorting?
- Date: Sun, 25 Sep 2005 18:45:30 +0100
- Message-id: <1127670330(dot)19345(dot)84(dot)camel(at)localhost(dot)localdomain>
On Fri, 2005-09-23 at 12:48 -0400, Ron Peacetree wrote: > > I have some indications from private tests that very high memory settings > >may actually hinder performance of the sorts, though I cannot explain that > >and wonder whether it is the performance tests themselves that have issues. > > > Hmmm. Are you talking about amounts so high that you are throwing the OS > into paging and swapping thrash behavior? If not, then the above is weird. Thanks for your thoughts. I'll retest, on the assumption that there is a benefit, but there's something wrong with my earlier tests. Best Regards, Simon Riggs
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