Re: BUG #17914: walsenders taking up all memory

On Tue, May 2, 2023 at 2:26 AM PG Bug reporting form
<noreply@postgresql.org> wrote:
>
> The following bug has been logged on the website:
>
> Bug reference:      17914
> Logged by:          Stan S
> Email address:      stashukny@gmail.com
> PostgreSQL version: 14.3
> Operating system:   AWS RDS - (Red Hat 7.3.1-12), 64-bit
> Description:
>
> Seeing the same issue as reported here:
> https://www.postgresql.org/message-id/CAMnUB3oYugXCBLSkih%2BqNsWQPciEwos6g_AMbnz_peNoxfHwyw%40mail.gmail.com
>
> In our case, logical_decoding_work_mem is set to 64 MB, yet walsenders can
> each take up 30 GB of memory, crashing our database.
>

I think we have previously also seen a similar complaint. Can you
please once check the analysis related to memory context in email [1]
and see if this is a similar problem?

[1] - https://www.postgresql.org/message-id/CAMnUB3pwknqoe5s-bGuRD8nX1bWkZRbFF=jWNLTWbm_etFigkA@mail.gmail.com

--
With Regards,
Amit Kapila.