Re: Poor performance o - Mailing list pgsql-performance

From Tom Lane
Subject Re: Poor performance o
Date
Msg-id 6629.1142983995@sss.pgh.pa.us
Whole thread Raw
In response to Poor performance o  ("Craig A. James" <cjames@modgraph-usa.com>)
Responses Re: Poor performance o  ("Craig A. James" <cjames@modgraph-usa.com>)
List pgsql-performance
"Craig A. James" <cjames@modgraph-usa.com> writes:
> It looks to me like the problem is the use of nested loops when a hash join should be used, but I'm no expert at
queryplanning. 

Given the sizes of the tables involved, you'd likely have to boost up
work_mem before the planner would consider a hash join.  What nondefault
configuration settings do you have, anyway?

            regards, tom lane

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