Horton

Re: PG 16 draft release notes ready

Bruce Momjian <bruce@momjian.us>

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From: Bruce Momjian <bruce@momjian.us>
To: David Rowley <dgrowleyml@gmail.com>
Cc: Andres Freund <andres@anarazel.de>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2023-05-30T23:31:59Z
Lists: pgsql-hackers

Commits

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

  1. Revert MAINTAIN privilege and pg_maintain predefined role.

  2. doc: PG 16 relnotes, remove "Have initdb use ICU by default"

  3. initdb: change default --locale-provider back to libc.

  4. doc: PG 16 relnotes, add author

  5. doc: PG 16 relnotes, move memory item and reword OUTER item

  6. doc: PG 16 relnotes, add memory overhead reduction item

  7. doc: PG 16 relnotes, adjust subscription origin mention

  8. doc: PG 16 relnotes, adjust auto_explain logging item

  9. doc: PG 16 relnotes: adjust outer/full hash join parallelization

  10. doc: PG 16 relnotes, fix duplicate author and commit

  11. doc: PG 16 relnotes, fix "locale" typo and windows locale text

  12. doc: PG 16 relnotes, add author from previous merge

  13. doc: PG 16 relnotes, wording adjustments

  14. doc: PG 16 relnotes, merge and move vector items

  15. doc: PG 16 relnotes, update xid/subxid searches item

  16. doc: PG 16 relnotes, SIMD improvements

  17. doc: PG 16 relnotes, add major features list

  18. doc: PG 16 relnotes, misc merged items and bootstrap detail

  19. doc: PG 16 relnotes, misc. updates

  20. doc: PG 16 relnotes, add commits

  21. Allow logical decoding on standbys

  22. Fix ts_headline() edge cases for empty query and empty search text.

  23. Add a hook for modifying the ldapbind password

  24. Rework design of functions in pg_walinspect

  25. initdb: derive encoding from locale for ICU; similar to libc.

  26. Doc: add XML ID attributes to <sectN> and <varlistentry> tags.

  27. Simplify the implementations of the to_reg* functions.

  28. Rename pg_dissect_walfile_name() to pg_split_walfile_name()

  29. Make materialized views participate in predicate locking

  30. Improve performance of and reduce overheads of memory management

  31. Allow grant-level control of role inheritance behavior.

On Thu, May 25, 2023 at 05:57:25PM +1200, David Rowley wrote:
> On Thu, 25 May 2023 at 05:45, Bruce Momjian <bruce@momjian.us> wrote:
> >
> > On Wed, May 24, 2023 at 01:43:50PM -0400, Bruce Momjian wrote:
> > > > * Reduce palloc() memory overhead for all memory allocations down to 8
> > > > bytes on all platforms. (Andres Freund, David Rowley)
> > > >
> > > > This allows more efficient use of memory and is especially useful in
> > > > queries which perform operations (such as sorting or hashing) that
> > > > require more than work_mem.
> > >
> > > Well, this would go in the source code section, but it seems too
> > > internal and global to mention.
> >
> > What was the previous memory allocation overhead?
> 
> On 64-bit builds, it was 16 bytes for AllocSet contexts, 24 bytes for
> generation contexts and 16 bytes for slab contexts.

Okay, item added to Source Code:

	<!--
	Author: David Rowley <drowley@postgresql.org>
	2022-08-29 [c6e0fe1f2] Improve performance of and reduce overheads of memory ma
	-->
	
	<listitem>
	<para>
	Reduce overhead of memory allocations (Andres Freund, David Rowley)
	</para>
	</listitem>

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

  Only you can decide what is important to you.