Horton

Re: [PoC] Improve dead tuple storage for lazy vacuum

Masahiko Sawada <sawada.mshk@gmail.com>

View thread View on postgr.es
From: Masahiko Sawada <sawada.mshk@gmail.com>
To: John Naylor <johncnaylorls@gmail.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>, Nathan Bossart <nathandbossart@gmail.com>, Andres Freund <andres@anarazel.de>, Matthias van de Meent <boekewurm+postgres@gmail.com>, Yura Sokolov <y.sokolov@postgrespro.ru>
Date: 2024-03-07T15:34:48Z
Lists: pgsql-hackers

Attachments

On Thu, Mar 7, 2024 at 8:06 PM John Naylor <johncnaylorls@gmail.com> wrote:
>
> On Thu, Mar 7, 2024 at 4:47 PM Masahiko Sawada <sawada.mshk@gmail.com> wrote:
> >
> > On Thu, Mar 7, 2024 at 6:37 PM John Naylor <johncnaylorls@gmail.com> wrote:
>
> > > $ git grep 'link_with: pgport_srv'
> > > src/test/modules/test_radixtree/meson.build:  link_with: pgport_srv,
> > >
> > > No other test module uses this directive, and indeed, removing this
> > > still builds fine for me. Thoughts?
> >
> > Yeah, it could be the culprit. The test_radixtree/meson.build is the
> > sole extension that explicitly specifies a link with pgport_srv. I
> > think we can get rid of it as I've also confirmed the build still fine
> > even without it.
>
> olingo and grassquit have turned green, so that must have been it.

Cool!

I've attached the remaining patches for CI. I've made some minor
changes in separate patches and drafted the commit message for
tidstore patch.

While reviewing the tidstore code, I thought that it would be more
appropriate to place tidstore.c under src/backend/lib instead of
src/backend/common/access since the tidstore is no longer implemented
only for heap or other access methods, and it might also be used by
executor nodes in the future. What do you think?

Regards,

--
Masahiko Sawada
Amazon Web Services: https://aws.amazon.com

Commits

  1. radixtree: Fix SIGSEGV at update of embeddable value to non-embeddable.

  2. Get rid of anonymous struct

  3. Teach radix tree to embed values at runtime

  4. Teach TID store to skip bitmap for small numbers of offsets

  5. Use bump context for TID bitmaps stored by vacuum

  6. Fix alignment of stack variable

  7. Use TidStore for dead tuple TIDs storage during lazy vacuum.

  8. Rethink create and attach APIs of shared TidStore.

  9. Fix inconsistent function prototypes with function definitions.

  10. Fix a calculation in TidStoreCreate().

  11. Fix potential integer handling issue in radixtree.h.

  12. Add TIDStore, to store sets of TIDs (ItemPointerData) efficiently.

  13. Fix link error for test_radixtree module on Windows

  14. Blind attempt to fix ODR violations

  15. Fix incorrect format specifier for int64

  16. Fix redefinition of typedefs

  17. Add template for adaptive radix tree

  18. Fix signedness error in 9f225e992 for gcc

  19. Introduce helper SIMD functions for small byte arrays

  20. Optimize vacuuming of relations with no indexes.

  21. Add bound check before bsearch() for performance

  22. Allocate consecutive blocks during parallel seqscans