Re: Memory leak in WAL sender with pgoutput (v10~)

From: Peter Smith <smithpb2250(at)gmail(dot)com>
To: Michael Paquier <michael(at)paquier(dot)xyz>
Cc: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Postgres hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Memory leak in WAL sender with pgoutput (v10~)
Date: 2024-12-03 06:56:48
Message-ID: CAHut+PtR85_yD-jJ08+ma5EsS6SEgAahRmXH7dsGA=ornhKAsA@mail.gmail.com
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On Tue, Dec 3, 2024 at 5:47 PM Michael Paquier <michael(at)paquier(dot)xyz> wrote:
>
> On Mon, Dec 02, 2024 at 03:29:56PM +0530, Amit Kapila wrote:
> > We can look at it from a different angle which is that the
> > FreePublication(s) relies on how the knowledge of Publication
> > structure is built. So, it doesn't look weird if we think from that
> > angle.
>
> OK, I can live with that on all the stable branches with an extra
> list free rather than a deep list free.
>
> I agree that the memory handling of this whole area needs some rework
> to make such leaks harder to introduce in the WAL sender. Still,
> let's first solve the problem at hand :)
>
> So how about the attached that introduces a FreePublication() matching
> with GetPublication(), used to do the cleanup? Feel free to comment.
> --

Perhaps the patch can use foreach_ptr macro instead of foreach?

======
Kind Regards,
Peter Smith.
Fujitsu Australia

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