From: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
---|---|
To: | "Imseih (AWS), Sami" <simseih(at)amazon(dot)com> |
Cc: | Nathan Bossart <nathandbossart(at)gmail(dot)com>, Peter Geoghegan <pg(at)bowt(dot)ie>, "Bossart, Nathan" <bossartn(at)amazon(dot)com>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Add index scan progress to pg_stat_progress_vacuum |
Date: | 2022-03-22 07:48:53 |
Message-ID: | CAD21AoDAj67or-qEMZfdtz74=dgEpt1D=6ZcGJMK8TGvpR38aQ@mail.gmail.com |
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On Tue, Mar 22, 2022 at 4:27 PM Imseih (AWS), Sami <simseih(at)amazon(dot)com> wrote:
>
> > BTW have we discussed another idea I mentioned before that we have the
> > leader process periodically check the number of completed indexes and
> > advertise it in its progress information? I'm not sure which one is
> > better but this idea would require only changes of vacuum code and
> > probably simpler than the current idea.
>
> > Regards,
>
>
> If I understand correctly, to accomplish this we will need to have the leader
> check the number of indexes completed In the ambukdelete or amvacuumcleanup
> callbacks. These routines do not know about PVIndStats, and they are called
> by both parallel and non-parallel vacuums.
>
> From what I can see, PVIndstats will need to be passed down to these routines
> or pass a NULL for non-parallel vacuums.
>
Can the leader pass a callback that checks PVIndStats to ambulkdelete
an amvacuumcleanup callbacks? I think that in the passed callback, the
leader checks if the number of processed indexes and updates its
progress information if the current progress needs to be updated.
Regards,
--
Masahiko Sawada
EDB: https://www.enterprisedb.com/
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