RE: analyze-in-stages post upgrade questions
От | Zechman, Derek S |
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Тема | RE: analyze-in-stages post upgrade questions |
Дата | |
Msg-id | PH0PR04MB8294E796D6297D4E3BE4EFB6C049A@PH0PR04MB8294.namprd04.prod.outlook.com обсуждение исходный текст |
Ответ на | Re: analyze-in-stages post upgrade questions (Laurenz Albe <laurenz.albe@cybertec.at>) |
Ответы |
Re: analyze-in-stages post upgrade questions
|
Список | pgsql-general |
> > Well, that wouldn't explain why it doesn't work on partitioned tables.
> > I am under the impression that it should.
> >
> > Derek, can cou share the pg_stats entries for the partitioned table?
>
> There are no entries in pg_stats for the parent table until after I manually run an analyze on it – Example below
You are right. I looked at the code, and "vacuumdb" does not process
partitiond tables, even if --analyze-only is specified. I find that
surprising, aince the SQL command ANALYZE (without a table name) will
also collect statistics for partitioned tables.
I think that it would be a good idea to change that behavior.
In particular, it makes a lot of sense to collect statistics for
partitioned tables after a "pg_upgrade".
Attached is a patch to make "vacuumdb --analyze-only" consider
partitioned tables as well.
Yours,
Laurenz Albe
Is there a plan to include this patch in future releases/patches of postgres?
Thanks,
(Derek) Sean
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