| From: | Corey Huinker <corey(dot)huinker(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Jeff Davis <pgsql(at)j-davis(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, jian he <jian(dot)universality(at)gmail(dot)com>, Nathan Bossart <nathandbossart(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Stephen Frost <sfrost(at)snowman(dot)net>, Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, alvherre(at)alvh(dot)no-ip(dot)org |
| Subject: | Re: Statistics Import and Export |
| Date: | 2025-02-24 20:45:10 |
| Message-ID: | CADkLM=dX67xer59tVYMCQZ+pHAT2sCyyrUDzeDCdW_TdxqwOgA@mail.gmail.com |
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| Lists: | pgsql-hackers |
>
>
>
> I suspect that this is a *really* bad idea. It's very very hard to get
> inplace
> updates right. We have several unfixed correctness bugs that are related to
> the use of inplace updates. I really don't think it's wise to add
> additional
> interfaces that can reach inplace updates unless there's really no other
> alternative (like not being able to assign an xid in VACUUM to be able to
> deal
> with anti-xid-wraparound-shutdown systems).
In this case, the alternative is an immediate doubling of the size of
pg_class right after a restore/upgrade.
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