Re: Vacuum, Freeze and Analyze: the big picture

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: Andres Freund <andres(at)2ndquadrant(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>
Subject: Re: Vacuum, Freeze and Analyze: the big picture
Date: 2013-05-30 19:11:23
Message-ID: 51A7A45B.1070700@agliodbs.com
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> Inhowfar did 8.4 make freezing worse? I can't remember any new problems
> there?

Before the Visibility Map, we always vacuumed all pages in a relation
when it was vacuumed at all. This means that we froze tuples at
vacuum_min_freeze_age, not at autovacuum_max_freeze_age, which is when
we do it post-8.4.

--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com

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