Re: Asynchronous MergeAppend

Hi Richard,
Hi Etsuro,

On Mon, Apr 6, 2026 at 8:33 AM Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com> wrote:
>
> On Mon, Apr 6, 2026 at 12:40 PM Richard Guo <guofenglinux(at)gmail(dot)com> wrote:
> > On Sun, Apr 5, 2026 at 11:25 AM Alexander Korotkov <aekorotkov(at)gmail(dot)com> wrote:
> > > I'm going to went through this patchset another time tomorrow and push
> > > it on Monday if there are no objections.
> >
> > I completely understand the desire to get this committed ahead of the
> > feature freeze. However, I'm concerned that a one-day notice over the
> > Easter weekend is simply too short for the community to see the
> > announcement, let alone provide feedback, especially since this is a
> > pretty big feature.
> >
> > I don't have any specific technical feedback on the patchset itself,
> > as I haven't reviewed it. My only hesitation is the short notice
> > period. That said, if you are highly confident in its readiness, I
> > will defer to your judgment.
>
> First, my apologies for not having reviewed this patch. I was
> planning to do so, but didn't have time for that, due to other
> priorities.
>
> I hate to say this, but as mentioned by Richard, this is a pretty big,
> complex feature, so I also think the one-day notice is too short.

Thank you for your feedback. I would say that this patch is here for
quite long, and it's pretty straightforward. It passed many rounds of
review by Matheus Alcantara. I've done a lot of minor cleanups and
improvements, and reorganized changes into multiple patches. The only
major change I did is actually a simplification which come from the
fact that only initial heap filling is effectively async [1]. Today
Matheus gave a feedback on my changes.

Surely, I wouldn't commit this patch without giving you a chance to
review. We can postpone it till early PG20 development cycle. But if
you find it possible to take a look at this patch during Apr 7, let me
know.

Links.
1. https://www.postgresql.org/message-id/CAPpHfdsO8zYpDW%3D%3DD6T5N0cJ%2BAzK7a_OyXJoYU1kFi%3DxZFTLuQ%40mail.gmail.com
2. https://www.postgresql.org/message-id/DHMH23M7UOFS.12W6PUDI1I3NH%40gmail.com

------
Regards,
Alexander Korotkov
Supabase