| From: | Peter Geoghegan <pg(at)bowt(dot)ie> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Noah Misch <noah(at)leadboat(dot)com>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com> |
| Subject: | Re: New IndexAM API controlling index vacuum strategies |
| Date: | 2021-04-06 00:09:02 |
| Message-ID: | CAH2-WzmXeJJhafhn8smfNOMYOr4MTtz=DAHJeAHhviRdz7-+cA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Apr 5, 2021 at 5:00 PM Andres Freund <andres(at)anarazel(dot)de> wrote:
> What do you mean with "appear to work"? Isn't, in 13, the only
> consequence of vac_strategy not being "propagated" that we'll not use a
> strategy in parallel workers? Presumably that was hard to notice
> because most people don't run manual VACUUM with cost limits turned
> on. And autovacuum doesn't use parallelism.
Oh yeah. "static BufferAccessStrategy vac_strategy" is guaranteed to
be initialized to 0, simply because it's static and global. That
explains it.
--
Peter Geoghegan
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