Horton

Re: First draft of the PG 15 release notes

Bruce Momjian <bruce@momjian.us>

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From: Bruce Momjian <bruce@momjian.us>
To: Matthias van de Meent <boekewurm+postgres@gmail.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2022-05-11T14:50:43Z
Lists: pgsql-hackers 
On Wed, May 11, 2022 at 02:19:20PM +0200, Matthias van de Meent wrote:
> On Tue, 10 May 2022 at 17:44, Bruce Momjian <bruce@momjian.us> wrote:
> >
> > I have completed the first draft of the PG 15 release notes and you can
> > see the results here:
> >
> >         https://momjian.us/pgsql_docs/release-15.html
> >
> > The feature count is similar to recent major releases:
> >
> >         release-10 195
> >         release-11 185
> >         release-12 198
> >         release-13 183
> >         release-14 229
> > -->     release-15 186
> >
> > I assume there will be major adjustments in the next few weeks based on
> > feedback.
> 
> With 10a8d138 (an extension on the work of PG14's 3c3b8a4b, which was
> listed in the release notes for PG14) we now truncate the LP array in
> more cases, which means that overall a workload with mainly HOT
> updates might require VACUUM to run less often to keep the relation
> size stable.
> 
> I will admit that I am tooting my own horn, but I think it is worth
> mentioning for DBAs, as it reduces the bloating behaviour of certain
> classes of bloat-generating workloads (and thus they might need to
> re-tune any vacuum-related settings).

We barely document HOT updates, and this change seems too marginal to
mention.  I think we already have enough VACUUM changes that people will
need to reevaluate their vacuum settings anyway.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  Indecision is a decision.  Inaction is an action.  Mark Batterson

Commits

  1. Doc: last minute adjustment to the release notes

  2. Doc: more tweaking of v15 release notes.

  3. Doc: further adjust notes about pg_upgrade_output.d.

  4. Doc: add list of major features to the v15 release notes.

  5. relnotes: update item about public schema permission change

  6. relnotes: update ordered partition scan item

  7. relnotes: add Heikki to UTF8 item

  8. relnotes: improve UTF8 text item in relation to ASCII

  9. relnotes: add null logical replication item

  10. relnotes: adjust several logical replication items and FK text

  11. relnotes: mention non-exclusive backup mode was deprecated

  12. relnotes: add author to in-memory sorts item

  13. relnotes: update for non-exclusive backup mode removal

  14. relnote: improve sorting entries

  15. relnotes: adjustments from Álvaro Herrera

  16. relnotes: update foreign key partition and add sort items

  17. relnotes: more adjustments

  18. relnotes: logical replication permissions checked by subscrib.

  19. relnotes: adjustments

  20. relnotes: remove sequence replication and update 'postgres -C'

  21. relnote: extensive updates

  22. relnotes: "training" -> "trailing"

  23. Standardize references to Zstandard as <productname>

  24. pgstat: Update docs to match the shared memory stats reality.

  25. Raise a WARNING for missing publications.

  26. Skip empty transactions for logical replication.

  27. Optionally disable subscriptions on error.

  28. Allow root-owned SSL private keys in libpq, not only the backend.

  29. Use COPY FREEZE in pgbench for faster benchmark table population.