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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: Thu, 29 Dec 2005 22:14:53 -0500
  • Message-id: <7723(dot)1135912493(at)sss(dot)pgh(dot)pa(dot)us>
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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