| From: | Alexander Korotkov <aekorotkov(at)gmail(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, Peter Geoghegan <pg(at)bowt(dot)ie>, chenhj <chjischj(at)163(dot)com>, Teodor Sigaev <teodor(at)sigaev(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Connections hang indefinitely while taking a gin index's LWLock buffer_content lock |
| Date: | 2019-03-23 08:43:04 |
| Message-ID: | CAPpHfds7QYCsKm5bj+WB2FweuxuZZBhkXwZhy8Sbzav=RHL35w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Mar 22, 2019 at 11:05 AM Alexander Korotkov
<aekorotkov(at)gmail(dot)com> wrote:
> On Fri, Mar 22, 2019 at 12:06 AM Alvaro Herrera
> <alvherre(at)2ndquadrant(dot)com> wrote:
> > On 2019-Mar-21, Alexander Korotkov wrote:
> >
> > > However, I think this still can be backpatched correctly. We can
> > > determine whether xlog record data contains deleteXid by its size.
> > > See the attached patch. I haven't test this yet. I'm going to test
> > > it. If OK, then push.
> >
> > Wow, this is so magical that I think it merits a long comment explaining
> > what is going on.
>
> Yeah, have to fo magic to fix such weird things :)
> Please, find next revision of patch attached. It uses static
> assertion to check that data structure size has changed. Also,
> assertion checks that record data length match on of structures
> length.
I'm going to backpatch this on no objections.
------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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