From: | Dilip Kumar <dilipbalaut(at)gmail(dot)com> |
---|---|
To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Sawada Masahiko <sawada(dot)mshk(at)gmail(dot)com>, "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com> |
Subject: | Re: Impact of checkpointer during pg_upgrade |
Date: | 2023-09-11 03:49:59 |
Message-ID: | CAFiTN-vp8f_wg4c6qnWqat_YBAOmrNrZANCEn51tCu76kxK1cw@mail.gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
On Fri, Sep 8, 2023 at 11:59 AM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> On Fri, Sep 8, 2023 at 10:10 AM Michael Paquier <michael(at)paquier(dot)xyz> wrote:
> >
> > On Fri, Sep 08, 2023 at 09:14:59AM +0530, Amit Kapila wrote:
> > > On Fri, Sep 8, 2023 at 9:00 AM Zhijie Hou (Fujitsu)
> > > <houzj(dot)fnst(at)fujitsu(dot)com> wrote:
> > >>> I
> > >>> mean that doing the latter is benefitial for the sake of any patch committed and
> > >>> as a long-term method to rely on.
> > >
> > > What is your worry here? Are you worried that unknowingly in the
> > > future we could add some other way to invalidate slots during upgrades
> > > that we won't be able to detect?
> >
> > Exactly. A safety belt would not hurt, especially if the belt added
> > is simple. The idea of a backend side elog(ERROR) with
> > isBinaryUpgrade is tempting in the invalidation slot path.
> >
>
> I agree with doing something simple. So, to conclude, we agree on two
> things in this thread (a) Use max_slot_wal_keep_size to -1 to start
> postmaster for the old cluster during the upgrade; (b) Have an
> elog(ERROR) to avoid invalidating slots during the upgrade.
+1
--
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com
From | Date | Subject | |
---|---|---|---|
Next Message | Fujii Masao | 2023-09-11 03:54:11 | Re: pg_logical_emit_message() misses a XLogFlush() |
Previous Message | shveta malik | 2023-09-11 02:56:21 | Re: Synchronizing slots from primary to standby |