Re: Minimal logical decoding on standbys

From: "Drouvot, Bertrand" <bertranddrouvot(dot)pg(at)gmail(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>, Jeff Davis <pgsql(at)j-davis(dot)com>
Cc: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Ibrar Ahmed <ibrar(dot)ahmad(at)gmail(dot)com>, Amit Khandekar <amitdkhan(dot)pg(at)gmail(dot)com>, fabriziomello(at)gmail(dot)com, tushar <tushar(dot)ahuja(at)enterprisedb(dot)com>, Rahila Syed <rahila(dot)syed(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Melanie Plageman <melanieplageman(at)gmail(dot)com>
Subject: Re: Minimal logical decoding on standbys
Date: 2023-04-05 15:57:31
Message-ID: 8a1d82fe-521f-ee3b-0b38-6959e20a191e@gmail.com
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Hi,

On 4/5/23 4:24 PM, Robert Haas wrote:
> On Tue, Apr 4, 2023 at 8:33 PM Jeff Davis <pgsql(at)j-davis(dot)com> wrote:
>> For comments, I agree that WalSndWakeup() clearly needs a comment
>> update. The call site in ApplyWalRecord() could also use a comment. You
>> could add a comment at every call site, but I don't think that's
>> necessary if there's a good comment over WalSndWakeup().
>
> Right, we don't want to go overboard, but I think putting some of the
> text you wrote above for the commit message, or something with a
> similar theme, in the comment for WalSndWakeup() would be quite
> helpful. We want people to understand why the physical and logical
> cases are different.

Gave it a try in V61 posted up-thread.

> I agree with you that ApplyWalRecord() is the other place where we
> need a good comment. I think the one in v60 needs more word-smithing.
> It should probably be a bit more detailed and clear about not only
> what we're doing but why we're doing it.

Gave it a try in V61 posted up-thread.

>
> Now that I understand what's going on here a bit better, I'm inclined
> to think that this patch is basically fine. At least, I don't see any
> obvious problem with it.

Thanks for the review and feedback!

Regards,

--
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com

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