Re: First draft of PG 19 release notes

Hi Bruce,

On Tue, Apr 14, 2026 at 6:19 PM Bruce Momjian <bruce(at)momjian(dot)us> wrote:
>
> I have completed the first draft of the PG 19 release notes:
>
> https://www.postgresql.org/docs/devel/release-19.html
>
> The feature count is 212. The recent average is 200:
>
> https://momjian.us/main/writings/pgsql/missing.pdf#page=3
>
> I will create a wiki page to explain my methods used to create this
> because, someday, someone else will need to do this.
>
> I am traveling April 19 to May 7, so I might not be able to make quick
> adjustments based on feedback. Another committer can handle them, or
> you can wait for me to get to it.

I've pushed a fix (8628df8891a) for how parallel vacuum computes the
cost-based vacuum delay. As I mentioned in the commit message, while
the fix corrects the delay computation, it could make VACUUM with the
PARALLEL option and cost-based delay enabled slower after upgrading to
v19. I think it's worth mentioning this in the release notes so that
users can re-tune the cost-based delay parameters. I've attached the
patch to add the item to the "Migration to Version 19" section. Please
review it.

Regards,

--
Masahiko Sawada
Amazon Web Services: https://aws.amazon.com