Re: Difference in execution plans pg12 vs pg14

From: Дмитрий Иванов <firstdismay(at)gmail(dot)com>
To: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
Cc: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: Difference in execution plans pg12 vs pg14
Date: 2021-12-11 01:51:55
Message-ID: CAPL5KHp4Vw3OQzpv9geCO4-N=fPZvWLL8K4yfBhEpEW9oH2x8Q@mail.gmail.com
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Yes, I did.
I reset table statistics, did (VACUUM) ANALYZE, recreated index. Nothing
changes.
I've deleted the database many times, dozens of times. Maybe something is
broken?
--
Regards, Dmitry!

сб, 11 дек. 2021 г. в 06:13, Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>:

> On 12/10/21 17:00, Дмитрий Иванов wrote:
> > Afternoon. I was able to make the necessary changes to my base needed to
> > migrate win_pg12 to debian pg14.
> > But there is a new problem, which was not there at the initial stage so
> > I checked:
> >
> > win_pg12:
> > -> Index Scan using index_class_tree_full on class c (cost=0.28..2.50
> > rows=1 width=235) (actual time=0.030..0.032 rows=1 loops=1)
> > Index Cond: (id = 650)
> > debian_pg14:
> > -> Index Scan using index_class_tree_full on class c (cost=0.28..2.50
> > rows=1 width=235) (actual time=842.795..842.796 rows=1 loops=1)
> > Index Cond: (id = 650)
> >
> > I'm wondering where to dig next...
>
> Did you run ANALYZE(updates table stats) on the 14 instance after doing
> the upgrade?
>
> > --
> > Best regards, Dmitry!
>
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com
>

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