Horton

Re: First draft of PG 17 release notes

Bruce Momjian <bruce@momjian.us>

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From: Bruce Momjian <bruce@momjian.us>
To: Masahiko Sawada <sawada.mshk@gmail.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2024-05-09T13:48:41Z
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 support for ALTER TABLE ... MERGE/SPLIT PARTITION(S) commands

  2. When creating materialized views, use REFRESH to load data.

  3. Revert temporal primary keys and foreign keys

  4. Avoid needless large memcpys in libpq socket writing

  5. Enhance nbtree ScalarArrayOp execution.

  6. Introduce a non-recursive JSON parser

  7. Combine freezing and pruning steps in VACUUM

  8. Allow SIGINT to cancel psql database reconnections.

  9. Provide API for streaming relation data.

  10. Add hash support functions and hash opclass for contrib/ltree.

  11. Pull up ANY-SUBLINK with the necessary lateral support.

  12. Read WAL directly from WAL buffers.

  13. Introduce the dynamic shared memory registry.

  14. Add macros for looping through a List without a ListCell.

  15. Support +/- infinity in the interval data type.

  16. Extend ALTER OPERATOR to allow setting more optimization attributes.

  17. Consider cheap startup paths in add_paths_to_append_rel

On Thu, May  9, 2024 at 02:17:12PM +0900, Masahiko Sawada wrote:
> Hi,
> 
> On Thu, May 9, 2024 at 1:03 PM Bruce Momjian <bruce@momjian.us> wrote:
> >
> > I have committed the first draft of the PG 17 release notes;  you can
> > see the results here:
> >
> >         https://momjian.us/pgsql_docs/release-17.html
> 
> Thank you for working on that!
> 
> I'd like to mention some of my works. I think we can add the vacuum
> performance improvements by the following commits:
> 
> - Add template for adaptive radix tree (ee1b30f1)
> - Add TIDStore, to store sets of TIDs (ItemPointerData) efficiently (30e144287)
> - Use TidStore for dead tuple TIDs storage during lazy vacuum (667e65aac)

Okay, I reworded the item, added authors, and added the commits:

	<!--
	Author: John Naylor <john.naylor@postgresql.org>
	2024-03-07 [ee1b30f12] Add template for adaptive radix tree
	Author: Masahiko Sawada <msawada@postgresql.org>
	2024-03-21 [30e144287] Add TIDStore, to store sets of TIDs (ItemPointerData) ef
	Author: Masahiko Sawada <msawada@postgresql.org>
	2024-04-02 [667e65aac] Use TidStore for dead tuple TIDs storage during lazy vac
	Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
	2024-04-03 [6dbb49026] Combine freezing and pruning steps in VACUUM
	-->
	
	<listitem>
	<para>
	Allow vacuum to more efficiently remove and freeze tuples (John Naylor, Masahiko Sawada, Melanie Plageman)
	</para>
	</listitem>

> Also, please consider the following item:
> 
> - Improve eviction algorithm in ReorderBuffer using max-heap for many
> subtransactions (5bec1d6bc)

I looked at that item and I don't have a generic "make logical
replication apply faster" item to merge it into, and many
subtransactions seemed like enough of an edge-case that I didn't think
mentioning it make sense.  Can you see a good place to add it?

> Finally, should we mention the following commit in the release note?
> It's not a user-visible change but added a new regression test module.
> 
> - Add tests for XID wraparound (e255b646a)

I don't normally add testing infrastructure changes unless they are
major.

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

  Only you can decide what is important to you.