From: Simon Riggs <simon@2ndquadrant.com>
To: Kevin Grittner <Kevin.Grittner@wicourts.gov>
Cc: pgsql-performance@postgresql.org
Subject: Re: Heavy write activity on first vacuum of fresh TOAST data
Date: Thu, 13 Dec 2007 16:11:23 +0000
Message-ID: <1197562283.4255.1829.camel@ebony.site> (raw)
In-Reply-To: <4760FF69.EE98.0025.0@wicourts.gov>
References: <4760FF69.EE98.0025.0@wicourts.gov>
On Thu, 2007-12-13 at 09:46 -0600, Kevin Grittner wrote:
> The data was inserted through a Java program using a prepared
> statement with no indexes on the table. The primary key was then
> added, and now I've started a vacuum. The new table wound up being
> the first big table vacuumed, and I noticed something odd. Even
> though there have been no rollbacks, updates, or deletes on this
> table, the vacuum is writing as much as it is reading while dealing
> with the TOAST data.
Writing hint bits. Annoying isn't it? :-(
--
Simon Riggs
2ndQuadrant http://www.2ndQuadrant.com
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To: pgsql-performance@postgresql.org
Cc: simon@2ndquadrant.com, Kevin.Grittner@wicourts.gov
Subject: Re: Heavy write activity on first vacuum of fresh TOAST data
In-Reply-To: <1197562283.4255.1829.camel@ebony.site>
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