Re: hash index improving v3

Bruce Momjian <[email protected]> Wed, 24 Sep 2008 12:04:22 -0400 (EDT)
Newsgroups gmane.comp.db.postgresql.devel.patches
Message-ID <[email protected]>
Can we consider this hash thread closed/completed?

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Tom Lane wrote:
> Simon Riggs <[email protected]> writes:
> > Thinks: Why not just sort all of the time and skip the debate entirely?
> 
> The sort is demonstrably a loser for smaller indexes.  Admittedly,
> if the index is small then the sort can't cost all that much, but if
> the (correct) threshold is some large fraction of shared_buffers then
> it could still take awhile on installations with lots-o-buffers.
> 
> The other side of that coin is that it's not clear this is really worth
> arguing about, much less exposing a separate parameter for.
> 
> 			regards, tom lane
> 
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  Bruce Momjian  <[email protected]>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

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