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To: "Kevin Grittner" <Kevin.Grittner@wicourts.gov>
cc: "Simon Riggs" <simon@2ndquadrant.com>, pgsql-performance@postgresql.org
Subject: Re: Heavy write activity on first vacuum of fresh TOAST data 
In-reply-to: <476108F2.EE98.0025.0@wicourts.gov> 
References: <4760FF69.EE98.0025.0@wicourts.gov>
	<1197562283.4255.1829.camel@ebony.site>
	<476108F2.EE98.0025.0@wicourts.gov>
Comments: In-reply-to "Kevin Grittner" <Kevin.Grittner@wicourts.gov>
	message dated "Thu, 13 Dec 2007 10:26:58 -0600"
Date: Thu, 13 Dec 2007 11:35:21 -0500
Message-ID: <13267.1197563721@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
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"Kevin Grittner" <Kevin.Grittner@wicourts.gov> writes:
> ... although to a naive user it's not clear what
> is known at vacuum time that the INSERT into the empty table
> couldn't have inferred.

The fact that the INSERT actually committed.

			regards, tom lane