Re: Perform streaming logical transactions by background workers and parallel apply - Mailing list pgsql-hackers

On Fri, Aug 19, 2022 at 2:36 PM Peter Smith <smithpb2250@gmail.com> wrote:
>
> Here are my review comments for the v23-0005 patch:
>
> ======
>
> Commit Message says:
> main_worker_pid is Process ID of the main apply worker, if this process is a
> apply background worker. NULL if this process is a main apply worker or a
> synchronization worker.
> The new column can make it easier to distinguish main apply worker and apply
> background worker.
>
> --
>
> Having a column called ‘main_worker_pid’ which is defined to be NULL
> if the process *is* the main apply worker does not make any sense to
> me.
>

I haven't read this part of a patch but it seems to me we have
something similar for parallel query workers. Refer 'leader_pid'
column in pg_stat_activity.

--
With Regards,
Amit Kapila.