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Re: [PERFORM] A Better External Sort?

From: "Jeffrey W(dot) Baker" <jwbaker(at)acm(dot)org>
To: josh(at)agliodbs(dot)com
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: [PERFORM] A Better External Sort?
Date: 2005-09-29 18:15:41
Message-ID: 1128017741.11474.13.camel@noodles (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-performance
On Thu, 2005-09-29 at 11:03 -0700, Josh Berkus wrote:
> Jeff,
> 
> > Josh, do you happen to know how many passes are needed in the multiphase
> > merge on your 60GB table?
> 
> No, any idea how to test that?

I would just run it under the profiler and see how many times
beginmerge() is called.

-jwb


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