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Re: [PERFORM] A Better External Sort?

  • From: "Jeffrey W. 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: Thu, 29 Sep 2005 11:15:41 -0700
  • Message-id: <1128017741(dot)11474(dot)13(dot)camel(at)noodles>
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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