Re: Logical Replication of sequences

From: vignesh C <vignesh21(at)gmail(dot)com>
To: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
Cc: Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, shveta malik <shveta(dot)malik(at)gmail(dot)com>, Shlok Kyal <shlok(dot)kyal(dot)oss(at)gmail(dot)com>, Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com>, Nisha Moond <nisha(dot)moond412(at)gmail(dot)com>, Peter Eisentraut <peter(at)eisentraut(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Euler Taveira <euler(at)eulerto(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, "Jonathan S(dot) Katz" <jkatz(at)postgresql(dot)org>
Subject: Re: Logical Replication of sequences
Date: 2025-10-27 11:44:54
Message-ID: CALDaNm2BKKpXQqbi0VHD19suFwRKRx3ydf6iVYDd-ybVBJoY5w@mail.gmail.com
Views: Whole Thread | Raw Message | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

On Sat, 25 Oct 2025 at 12:27, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> On Fri, Oct 24, 2025 at 8:52 PM vignesh C <vignesh21(at)gmail(dot)com> wrote:
> >
> > On Thu, 23 Oct 2025 at 16:47, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> > >
> > > On Thu, Oct 23, 2025 at 11:45 AM vignesh C <vignesh21(at)gmail(dot)com> wrote:
> > > >
> > > > The attached patch has the changes for the same.
> > > >
> > >
> > > I have pushed 0001 and the following are comments on 0002.
> > >
> > > 1.
> > > @@ -1414,6 +1414,7 @@ CREATE VIEW pg_stat_subscription_stats AS
> > > ss.subid,
> > > s.subname,
> > > ss.apply_error_count,
> > > + ss.sequence_sync_error_count,
> > > ss.sync_error_count,
> > >
> > > The new parameter name is noticeably longer than other columns. Can we
> > > name it as ss.seq_sync_error_count. We may also want to reconsider
> > > changing existing column sync_error_count to tbl_sync_error_count. Can
> > > we extract this in a separate stats patch?
> >
> > Modified and extracted a separate patch for tbl_sync_error_count
> >
>
> Hmm, I didn't want to make the stats related changes before the main
> patch. I suggested to extract seq_sync_error_count from the main patch
> and keep it after the main patch.

Made this change.

> Along with the seq_sync_error_count
> stats, we can discuss whether to change existing parameter to
> tbl_sync_error_count.

I have removed the tbl_sync_error_count changes for now, I will add it
if required when we get to that patch.

This version also addresses Chao's comments on 0002 which he posted at [1].
The attached patch has the changes for the same.

[1] - https://www.postgresql.org/message-id/BABE39BA-6893-4D65-8432-5523960FFC2B%40gmail.com

Regards,
Vignesh

Attachment Content-Type Size
v20251027-0003-Documentation-for-sequence-synchronization.patch application/octet-stream 21.1 KB
v20251027-0004-Add-seq_sync_error_count-to-subscription-s.patch application/octet-stream 21.5 KB
v20251027-0001-Add-worker-type-argument-to-logicalrep_wor.patch application/octet-stream 9.9 KB
v20251027-0002-New-worker-for-sequence-synchronization-du.patch application/octet-stream 68.8 KB

In response to

Browse pgsql-hackers by date

  From Date Subject
Next Message Maxim Orlov 2025-10-27 11:48:43 Re: AIO writes vs hint bits vs checksums
Previous Message Amit Kapila 2025-10-27 11:40:19 Re: Logical Replication of sequences