Re: speed up a logical replica setup

From: "Euler Taveira" <euler(at)eulerto(dot)com>
To: "vignesh C" <vignesh21(at)gmail(dot)com>, "kuroda(dot)hayato(at)fujitsu(dot)com" <kuroda(dot)hayato(at)fujitsu(dot)com>
Cc: "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>, "Tomas Vondra" <tomas(dot)vondra(at)enterprisedb(dot)com>, "Michael Paquier" <michael(at)paquier(dot)xyz>, "Peter Eisentraut" <peter(at)eisentraut(dot)org>, "Andres Freund" <andres(at)anarazel(dot)de>, "Ashutosh Bapat" <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, "Amit Kapila" <amit(dot)kapila16(at)gmail(dot)com>, "Shlok Kyal" <shlok(dot)kyal(dot)oss(at)gmail(dot)com>, Fabrízio de Royes Mello <fabriziomello(at)gmail(dot)com>
Subject: Re: speed up a logical replica setup
Date: 2024-03-16 15:46:07
Message-ID: 60a297be-c0c7-4468-88d2-81ba560e1f9f@app.fastmail.com
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On Sat, Mar 16, 2024, at 10:31 AM, vignesh C wrote:
> I was able to reproduce this random failure and found the following reason:
> The Minimum recovery ending location 0/5000000 was more than the
> recovery_target_lsn specified is "0/4001198". In few random cases the
> standby applies a few more WAL records after the replication slot is
> created; this leads to minimum recovery ending location being greater
> than the recovery_target_lsn because of which the server will fail
> with:
> FATAL: requested recovery stop point is before consistent recovery point

Thanks for checking. I proposed an alternative patch for it [1]. Can you check
it?

[1] https://www.postgresql.org/message-id/34637e7f-0330-420d-8f45-1d022962d2fe%40app.fastmail.com

--
Euler Taveira
EDB https://www.enterprisedb.com/

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