Re: lastOverflowedXid does not handle transaction ID wraparound

From: Alexander Korotkov <aekorotkov(at)gmail(dot)com>
To: Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>
Cc: Simon Riggs <simon(dot)riggs(at)enterprisedb(dot)com>, Stan Hu <stanhu(at)gmail(dot)com>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: lastOverflowedXid does not handle transaction ID wraparound
Date: 2021-11-06 16:16:09
Message-ID: CAPpHfdvV4C+6a_FJBAnzE8DTcVEdOPYNq0z5nKJGwqd8mzsZZg@mail.gmail.com
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Hi!

On Fri, Nov 5, 2021 at 10:31 AM Kyotaro Horiguchi
<horikyota(dot)ntt(at)gmail(dot)com> wrote:
> At Thu, 4 Nov 2021 01:07:05 +0300, Alexander Korotkov <aekorotkov(at)gmail(dot)com> wrote in
> > On Wed, Nov 3, 2021 at 8:51 PM Simon Riggs <simon(dot)riggs(at)enterprisedb(dot)com> wrote:
> > > It is however, an undocumented modularity violation. I think that is
> > > acceptable because of the ProcArrayLock traffic, but needs to have a
> > > comment to explain this at the call to
> > > ExpireOldKnownAssignedTransactionIds() i.e. " and potentially reset
> > > lastOverflowedXid", as well as a comment on the
> > > ExpireOldKnownAssignedTransactionIds() function.
> >
> > Thank you for your feedback. Please find the revised patch attached.
> > It incorporates this function comment changes altogether with minor
> > editings and commit message. Let me know if you have further
> > suggestions.
> >
> > I'm going to push this if no objections.
>
> Thanks for taking a look on and refining this, Simon and Alex! (while
> I was sick in bed X:)
>
> It looks good to me except the commit Author doesn't contain the name
> of Alexander Korotkov?

Thank you for the suggestion. And thanks to everybody for the feedback.
Pushed!

------
Regards,
Alexander Korotkov

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