Re: the big picture for index-only scans

From: Florian Pflug <fgp(at)phlo(dot)org>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Cédric Villemain <cedric(dot)villemain(dot)debian(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Subject: Re: the big picture for index-only scans
Date: 2011-06-19 21:10:49
Message-ID: 2D8C549E-00CF-4DFD-BF1F-C70E3369CB87@phlo.org
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On Jun19, 2011, at 20:40 , Robert Haas wrote:
> 2. Since VACUUM and ANALYZE often run together, we will be estimating
> the percentage of rows on all-visible pages just at the time when that
> percentage is highest. This is not exactly wonderful, either...

Hm, doesn't autovacuum run ANALYZE quite a bit more frequently than
VACUUM by default?

best regards,
Florian Pflug

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