Re: OUTER JOIN performance regression remains in 8.3beta4 - Mailing list pgsql-hackers

From Kevin Grittner
Subject Re: OUTER JOIN performance regression remains in 8.3beta4
Date
Msg-id 477E5BF4.EE98.0025.0@wicourts.gov
Whole thread Raw
In response to OUTER JOIN performance regression remains in 8.3beta4  ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>)
Responses Re: OUTER JOIN performance regression remains in 8.3beta4  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
>>> On Fri, Jan 4, 2008 at 12:16 PM, in message
<477E238D.EE98.0025.0@wicourts.gov>, "Kevin Grittner"
<Kevin.Grittner@wicourts.gov> wrote:
> problems remain in 8.3beta4.
As I poked around at this, it started to seem familiar.  I had
previously posted about this query's performance under 8.2.4.
http://archives.postgresql.org/pgsql-performance/2007-10/msg00087.php
To summarize, under 8.2.4 it runs in less than half a millisecond
if I set enable_hashjoin = off and thousand times that long with
enable_hashjoin = on.  Under 8.3beta4 this has jumped to 113114 ms.
-Kevin




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