On Fri, Mar 6, 2020 at 9:43 AM Tom Lane <t...@sss.pgh.pa.us> wrote:

> Jeremy Finzel <finz...@gmail.com> writes:
> > We are hitting this leak in production on an 11.6 system for a query that
> > is using a parallel hash join.  Was this fix pushed in 11.7? I can't tell
> > clearly from the release notes for 11.7 or this thread.
>
> It looks like you're asking about this commit:
>
> Author: Thomas Munro <tmu...@postgresql.org>
> Branch: master [76cbfcdf3] 2019-11-16 10:11:30 +1300
> Branch: REL_12_STABLE Release: REL_12_2 [24897e1a1] 2019-11-16 10:18:45
> +1300
> Branch: REL_11_STABLE Release: REL_11_7 [bc049d0d4] 2019-11-16 10:19:16
> +1300
>
>     Always call ExecShutdownNode() if appropriate.
>
> which is documented thus in the 11.7 release notes:
>
>     <listitem>
> <!--
> Author: Thomas Munro <tmu...@postgresql.org>
> Branch: master [76cbfcdf3] 2019-11-16 10:11:30 +1300
> Branch: REL_12_STABLE [24897e1a1] 2019-11-16 10:18:45 +1300
> Branch: REL_11_STABLE [bc049d0d4] 2019-11-16 10:19:16 +1300
> -->
>      <para>
>       Ensure parallel plans are always shut down at the correct time
>       (Kyotaro Horiguchi)
>      </para>
>
>      <para>
>       This oversight is known to result in <quote>temporary file
>       leak</quote> warnings from multi-batch parallel hash joins.
>      </para>
>     </listitem>
>
>
>                         regards, tom lane
>

Thank you!  Yep, pretty clear :).

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