Re: Poor performance o

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Craig A(dot) James" <cjames(at)modgraph-usa(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Poor performance o
Date: 2006-03-21 23:33:15
Message-ID: 6629.1142983995@sss.pgh.pa.us
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"Craig A. James" <cjames(at)modgraph-usa(dot)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 query planning.

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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