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Re: New IndexAM API controlling index vacuum strategies

Masahiko Sawada <sawada.mshk@gmail.com>

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From: Masahiko Sawada <sawada.mshk@gmail.com>
To: Peter Geoghegan <pg@bowt.ie>
Cc: Matthias van de Meent <boekewurm+postgres@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Andres Freund <andres@anarazel.de>, PostgreSQL-development <pgsql-hackers@postgresql.org>, Noah Misch <noah@leadboat.com>
Date: 2021-04-13T06:05:11Z
Lists: pgsql-hackers 
On Thu, Apr 8, 2021 at 11:42 AM Masahiko Sawada <sawada.mshk@gmail.com> wrote:
>
> On Thu, Apr 8, 2021 at 8:41 AM Peter Geoghegan <pg@bowt.ie> wrote:
> >
> > On Wed, Apr 7, 2021 at 8:52 AM Peter Geoghegan <pg@bowt.ie> wrote:
> > > All of the changes from your fixup patch are clear improvements, and
> > > so I'll include them in the final commit. Thanks!

I realized that when the failsafe is triggered, we don't bypass heap
truncation that is performed before updating relfrozenxid. I think
it's better to bypass it too. What do you think?

Regards,

-- 
Masahiko Sawada
EDB:  https://www.enterprisedb.com/

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Don't truncate heap when VACUUM's failsafe is in effect.

  2. Teach VACUUM to bypass unnecessary index vacuuming.

  3. Add wraparound failsafe to VACUUM.

  4. Truncate line pointer array during VACUUM.

  5. Remove tupgone special case from vacuumlazy.c.

  6. Refactor lazy_scan_heap() loop.

  7. Propagate parallel VACUUM's buffer access strategy.

  8. Simplify state managed by VACUUM.

  9. Notice that heap page has dead items during VACUUM.

  10. Adjust lazy_scan_heap() accounting comments.

  11. Use full 64-bit XID for checking if a deleted GiST page is old enough.

  12. Fix some problems with VACUUM (INDEX_CLEANUP FALSE).