From: Tom Lane <tgl@sss.pgh.pa.us>
To: Jeff Davis <pgsql@j-davis.com>
cc: Robert Haas <robertmhaas@gmail.com>, Andres Freund <andres@anarazel.de>,
        Corey Huinker <corey.huinker@gmail.com>,
        Michael Paquier <michael@paquier.xyz>,
        jian he <jian.universality@gmail.com>,
        Nathan Bossart <nathandbossart@gmail.com>,
        Bruce Momjian <bruce@momjian.us>,
        Matthias van de Meent <boekewurm+postgres@gmail.com>,
        Magnus Hagander <magnus@hagander.net>,
        Stephen Frost <sfrost@snowman.net>,
        Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>,
        Peter Smith <smithpb2250@gmail.com>,
        PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>,
        alvherre@alvh.no-ip.org
Subject: Re: Statistics Import and Export
In-reply-to: <c377490fdad595e4aed703f6da7f82ced51190a8.camel@j-davis.com>
References: <blezfpeafycxlizyynwvwzh2vywmklhvfqudhicjrccu4raqpx@4ttfufowc2vo> <3728741.1740178078@sss.pgh.pa.us> <CADkLM=f0a43aTd88xW4xCFayEF25g-7hTrHX_WhV40HyocsUGg@mail.gmail.com> <97b451228227c555be1a4f79c4a62ddec9a74f06.camel@j-davis.com> <CADkLM=ckXu5wzSQZ3Y_fvAaL8rZ+upZdSecBLf5FCTMj7M6T-A@mail.gmail.com> <b227c4fca29dfb893bb414ce6d84fc2377489ecc.camel@j-davis.com> <CADkLM=dRMC6t8gp9GVf6y6E_r5EChQjMAAh_vPyih_zMiq0zvA@mail.gmail.com> <y2d36zf6pl3n6ni6e4ctblu3a5iazi2dycknq53h2mjvp7lto4@hhww3h2qgdrw> <1457469.1740419458@sss.pgh.pa.us> <CADkLM=eWSv2z_DVB=psfwHitq7DbFJQaP9A46R27eARC-4OYtQ@mail.gmail.com> <cpdanvzykcb5o64rmapkx6n5gjypoce3y52hff7ocxupgpbxu4@53jmlyvukijo> <CA+Tgmoaiyv5hA_LrdDyU-=Fu28R3ZhE=mSRfxj7x0ajDBM0Njg@mail.gmail.com> <6cac9c19fd64d5a2bd8ecd794ce9e84e9998b814.camel@j-davis.com> <CA+TgmoZwaLN9FzvMBW-2Yg_6PeenDhEg-8BRYX+yj8pSPcQ1aQ@mail.gmail.com> <c377490fdad595e4aed703f6da7f82ced51190a8.camel@j-davis.com>
Comments: In-reply-to Jeff Davis <pgsql@j-davis.com>
	message dated "Wed, 26 Feb 2025 13:32:26 -0800"
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Date: Wed, 26 Feb 2025 16:44:20 -0500
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Jeff Davis <pgsql@j-davis.com> writes:
> That would be a separate thread, but it's good to know that there is a
> general consensus that we don't want to use in-place updates for non-
> critical things like stats (and perhaps eliminate them entirely). In
> other words, the inconcistency likely won't last forever.

I'm quite sure that the original argument for using in-place updates
for this was not wanting a full-database VACUUM or ANALYZE to update
every tuple in pg_class.  At the time that definitely did lead to
more-or-less 2x bloat.  The new information we have now is that that's
no longer the case, and thus the decision can and should be revisited.

			regards, tom lane