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From: Michael Paquier <michael@paquier.xyz>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Andres Freund <andres@anarazel.de>
Cc: Dilip Kumar <dilipbalaut@gmail.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Cc: Robert Haas <robertmhaas@gmail.com>
Subject: Re: Move pg_attribute.attcompression to earlier in struct for reduced size?
Date: Thu, 27 May 2021 13:04:38 +0900
Message-ID: <YK8aVuS0+8JOe8IM@paquier.xyz> (raw)
In-Reply-To: <1685584.1622086493@sss.pgh.pa.us>
References: <YKtpZI4PBpVG3ryH@paquier.xyz>
	<CAFiTN-vpHrCzdeyKxpoPViyJCZZx-h8KghQJFyxZd7+Dys6Cow@mail.gmail.com>
	<YKyPM6UC+tBHEuxo@paquier.xyz>
	<20210527003144.xxqppojoiwurc2iz@alap3.anarazel.de>
	<1677691.1622075746@sss.pgh.pa.us>
	<20210527015415.ctuj4yrwnjip5kve@alap3.anarazel.de>
	<20210527021402.b5n2sqw66y2fd6fl@alap3.anarazel.de>
	<1683251.1622083422@sss.pgh.pa.us>
	<20210527032105.xistjgattubmjymm@alap3.anarazel.de>
	<1685584.1622086493@sss.pgh.pa.us>

On Wed, May 26, 2021 at 11:34:53PM -0400, Tom Lane wrote:
> So maybe we should just dump the promise that VACUUM FULL will recompress
> everything?  I'd be in favor of that actually, because it seems 100%
> outside the charter of either VACUUM FULL or CLUSTER.

Hmm.  You are right that by default this may not be worth the extra
cost.  We could make that easily an option, though, for users ready to
accept this cost.  And that could be handy when it comes to a
database-wise VACUUM.
--
Michael

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  Cc: michael@paquier.xyz, tgl@sss.pgh.pa.us, andres@anarazel.de, dilipbalaut@gmail.com, robertmhaas@gmail.com
  Subject: Re: Move pg_attribute.attcompression to earlier in struct for reduced size?
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