Re: Does VACUUM reorder tables on clustered indices

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: Andrew Sullivan <ajs(at)crankycanuck(dot)ca>, PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>
Subject: Re: Does VACUUM reorder tables on clustered indices
Date: 2005-12-30 03:14:53
Message-ID: 7723.1135912493@sss.pgh.pa.us
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Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Tom, has this bug been addressed or documented?

No. Please add a TODO:

* Make CLUSTER preserve recently-dead tuples per MVCC requirements

I have not tested, but I suspect the table-rewriting variants of ALTER TABLE
have the same problem.

regards, tom lane

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