Horton
Menu

Re: First draft of PG 19 release notes

Bruce Momjian <bruce@momjian.us>

View thread
From: Bruce Momjian <bruce@momjian.us>
To: Srinath Reddy Sadipiralla <srinath2133@gmail.com>
Cc: PostgreSQL-development <pgsql-hackers@lists.postgresql.org>
Date: 2026-06-16T23:41:23Z
Lists: pgsql-hackers 
On Thu, Jun 11, 2026 at 02:31:38PM +0530, Srinath Reddy Sadipiralla wrote:
> Hi Bruce,
> 
> On Wed, Apr 15, 2026 at 6:49 AM Bruce Momjian <bruce@momjian.us> wrote:
> 
>     I have completed the first draft of the PG 19 release notes:
> 
>             https://www.postgresql.org/docs/devel/release-19.html
> 
> 
> Thanks for working on this.
> 
> I noticed the notes don't mention the pg_rewind improvement committed in
> 5173bfd0 ("pg_rewind: Skip copy of WAL segments generated before point of
> divergence") [0].
> 
> [0] - https://www.postgresql.org/message-id/flat/
> 181b4c6fa9c.b8b725681941212.7547232617810891479%40viggy28.dev

True.  In reading the commit message, it seems like a minor improvement
that wasn't worth mentioning;   it says:

	This commit makes the way WAL segments are handled from the source
	to the target server slightly smarter:
	                     ----------------

and

	This change can make the rewind operation cheaper in some
	configurations, especially for setups where some WAL retention
	causes many segments to remain on the source server even after the
	promotion of a standby used as source to rewind a previous primary.

It seemed like a nice improvement, but not something that would be
useful for the average user to know.

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

  Do not let urgent matters crowd out time for investment in the future.

Commits

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

  1. doc PG 19 relnotes: remove VALIDATE CONSTRAINT lock item

  2. Fix ALTER DOMAIN VALIDATE CONSTRAINT locking

  3. Revert "Enable fast default for domains with non-volatile constraints"

  4. doc PG 19 relnotes: improve awkward or confusing wording

  5. doc PG 19 relnotes: more fixes

  6. doc PG 19 relnotes: various corrections

  7. doc PG 19 relnotes: adjust item to mention pg_replication_slots

  8. doc PG 19 relnotes: remove "Add fake LSN support to hash index"

  9. doc PG 19 relnotes: add two optimizer hooks

  10. doc PG 19 relnotes: remove "Optionally" for CPU optimizations

  11. doc PG 19 relnotes: adjustments/removal of items

  12. doc PG 19 relnotes: add UTF-8 case folding performance item

  13. doc PG 19 relnotes: correct two items

  14. doc PG 19 relnotes: add missing commits and details

  15. doc PG 19 relnotes: fix typo, "date" -> "data"

  16. doc PG 19 relnotes: add author and move items

  17. doc PG 19 relnotes: update author

  18. doc PG 19 relnotes: add free space map all-visible item

  19. doc PG 19 relnotes: remove "Lakshmi N" as author of checksums

  20. doc PG 19 relnotes: fix "now targets"

  21. doc PG 19 relnotes: adjust ShmemRequestStruct item

  22. Improve various new-to-v19 appendStringInfo calls

  23. doc: Fix data_checksums data type

  24. Fix WITHOUT OVERLAPS' interaction with domains.

  25. Online enabling and disabling of data checksums

  26. Doc: split functions-posix-regexp section into multiple subsections.

  27. make immutability tests in to_json and to_jsonb complete

  28. Optimize tuple deformation

  29. pgstattuple: Optimize pgstattuple_approx() with streaming read

  30. Use fake LSNs to improve nbtree dropPin behavior.

  31. Use streaming read for VACUUM cleanup of GIN

  32. Clean up ICU includes.

  33. ICU: use UTF8-optimized case conversion API

  34. Add the MODE option to the WAIT FOR LSN command

  35. Speedup tuple deformation with additional function inlining