Re: vacuum freeze in 96

From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
To: Torsten Förtsch <tfoertsch123(at)gmail(dot)com>
Cc: PostgreSQL mailing lists <pgsql-general(at)postgresql(dot)org>
Subject: Re: vacuum freeze in 96
Date: 2016-12-14 04:59:50
Message-ID: CAB7nPqQH9Ftf_TPDEbYJz4sR6qrdBmu3BuMVY3Le7zauKqsbLA@mail.gmail.com
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On Wed, Dec 14, 2016 at 5:00 AM, Torsten Förtsch <tfoertsch123(at)gmail(dot)com> wrote:
> one of the major enhancements in 96 is skipping completely frozen pages in
> vacuum freeze. I assume that requires a special bit on the page.

The freeze map uses an additional bit in the vm, and pg_upgrade would
take care of the conversion.
--
Michael

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