Horton

Re: First draft of PG 17 release notes

Jelte Fennema-Nio <postgres@jeltef.nl>

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From: Jelte Fennema-Nio <postgres@jeltef.nl>
To: Bruce Momjian <bruce@momjian.us>
Cc: Joe Conway <mail@joeconway.com>, Tom Lane <tgl@sss.pgh.pa.us>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2024-05-14T12:20:24Z
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 Tue, 14 May 2024 at 02:56, Bruce Momjian <bruce@momjian.us> wrote:
>
> On Sat, May 11, 2024 at 10:24:39AM -0400, Joe Conway wrote:
> > On 5/11/24 09:57, Jelte Fennema-Nio wrote:
> > > The buffering change improved performance up to ~40% in some of the
> > > benchmarks. The case it improves mostly is COPY of large rows and
> > > streaming a base backup. That sounds user-visible enough to me to
> > > warrant an entry imho.
> >
> > +1
>
> Attached patch applied.

I think we shouldn't list this under the libpq changes and shouldn't
mention libpq in the description, since this patch changes
src/backend/libpq files instead of src/interfaces/libpq files. I think
it should be in the "General performance" section and describe the
change as something like the below:

Improve performance when transferring large blocks of data to a client

PS. I completely understand that this was not clear from the commit message.