Re: PG16 walsender hangs in ResourceArrayEnlarge using pgoutput

On Tue, Jun 25, 2024 at 5:17 PM Zhijie Hou (Fujitsu)
<houzj(dot)fnst(at)fujitsu(dot)com> wrote:
>
> On Tuesday, June 25, 2024 3:53 PM Bowen Shi <zxwsbg12138(at)gmail(dot)com> wrote:
>
> Thanks for reporting and analyzing the issue !
>
> You analysis looks good to me, I think I missed to drop the newly created
> slot when changing the logic to support row filter. Here is a small patch
> to drop the slots in each cycle, it can fix the issue on my machine.
>
> IIUC, the issue exists from PG15~HEAD. The current patch can apply
> on PG16~HEAD, If it looks ok, I will test and prepare the patch for the
> other branch.
>

IIUC, the relevant code was added in commit
da324d6cd45bbbcc1682cc2fcbc4f575281916af. This is a PG16 commit, so
how can the problem occur in PG15?

BTW, can we think of a resource owner for managing pgoutput resources
similar to the memory context we have in PGOutputData? This will avoid
allocating the resources in Xact or other resource owners. This will
make resource management local to pgoutput similar to what we have for
memory context in PGOutputData. I suggest having a separate resource
owner only for the HEAD branch (which will be PG18).

--
With Regards,
Amit Kapila.