Re: v12 "won't fix" item regarding memory leak in "ATTACH PARTITIONwithout AEL"; (or, relcache ref counting)

On Mon, Feb 24, 2020 at 7:01 AM Justin Pryzby <pryzby@telsasoft.com> wrote:
> This links to a long thread, from which I've tried to quote some of the
> most important mails, below.
> https://wiki.postgresql.org/wiki/PostgreSQL_12_Open_Items#Won.27t_Fix
>
> I wondered if there's an effort to pursue a resolution for v13 ?

I think commit 5b9312378 in master branch fixes this.  Commit message
mentions it like this:

    ...
    Also, fix things so that old copies of a relcache partition descriptor
    will be dropped when the cache entry's refcount goes to zero.  In the
    previous coding it was possible for such copies to survive for the
    lifetime of the session, as I'd complained of in a previous discussion.
    (This management technique still isn't perfect, but it's better than
    before.)
    ...
    ...Although this is a pre-existing
    problem, no back-patch: the patch seems too invasive to be safe to
    back-patch, and the bug it fixes is a corner case that seems
    relatively unlikely to cause problems in the field.

    Discussion:
https://postgr.es/m/CA+HiwqFUzjfj9HEsJtYWcr1SgQ_=iCAvQ=O2Sx6aQxoDu4OiHw@mail.gmail.com
    Discussion:
https://postgr.es/m/CA+TgmoY3bRmGB6-DUnoVy5fJoreiBJ43rwMrQRCdPXuKt4Ykaw@mail.gmail.com

Thanks,
Amit