From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andrus <eetasoft@online.ee>
Cc: pgsql-performance@postgresql.org
Subject: Re: Query runs too long for indexed tables
Date: Wed, 05 Apr 2006 10:09:55 -0400
Message-ID: <27543.1144246195@sss.pgh.pa.us> (raw)
In-Reply-To: <e1039l$15ie$1@news.hub.org>
References: <e0ui0o$2v0m$2@news.hub.org>
<1144180128.32266.56.camel@state.g2switchworks.com>
<e1039l$15ie$1@news.hub.org>
"Andrus" <eetasoft@online.ee> writes:
> UPDATE firma1.rid SET toode=NULL
> WHERE toode IS NOT NULL AND
> toode NOT IN (SELECT TOODE FROM firma1.TOODE);
> How to speed this up ?
Increasing work_mem to the point where you get a hashed NOT-IN would
help, probably. Have you tried using EXPLAIN to see what the plan is
for the UPDATEs?
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, eetasoft@online.ee
Subject: Re: Query runs too long for indexed tables
In-Reply-To: <27543.1144246195@sss.pgh.pa.us>
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