Re: speed up a logical replica setup

On Thu, Jan 4, 2024 at 8:52 AM Euler Taveira <euler@eulerto.com> wrote:
>
> On Mon, Jan 1, 2024, at 7:14 AM, vignesh C wrote:
>
>
> 5) I felt the target server should be started before completion of
> pg_subscriber:
>
>
> Why?
>

Won't it be a better user experience that after setting up the target
server as a logical replica (subscriber), it started to work
seamlessly without user intervention?

> The initial version had an option to stop the subscriber. I decided to
> remove the option and stop the subscriber by default mainly because (1) it is
> an extra step to start the server (another point is that the WAL retention
> doesn't happen due to additional (synchronized?) replication slots on
> subscriber -- point 2). It was a conservative choice. If point 2 isn't an
> issue, imo point 1 is no big deal.
>

By point 2, do you mean to have a check for "max replication slots"?
It so, the one possibility is to even increase that config, if the
required max_replication_slots is low.

--
With Regards,
Amit Kapila.