Re: speed up a logical replica setup - Mailing list pgsql-hackers

On Wed, Jul 10, 2024 at 4:51 PM Euler Taveira <euler@eulerto.com> wrote:
>
> On Tue, Jul 9, 2024, at 8:00 AM, Alexander Lakhin wrote:
>
> Hello Amit and Kuroda-san,
>
> 03.07.2024 14:02, Amit Kapila wrote:
> > Pushed 0002 and 0003. Let's wait for a discussion on 0001.
>
> Please look at another failure of the test [1]:
> [13:28:05.647](2.460s) not ok 26 - failover slot is synced
> [13:28:05.648](0.001s) #   Failed test 'failover slot is synced'
> #   at /home/bf/bf-build/skink-master/HEAD/pgsql/src/bin/pg_basebackup/t/040_pg_createsubscriber.pl line 307.
> [13:28:05.648](0.000s) #          got: ''
> #     expected: 'failover_slot'
>
>
> I'm wondering if the attached patch is sufficient to move the restart_lsn
> forward.
>

This won't guarantee that xmin of the logical slot on the primary has
moved ahead or at least we haven't ensured the same. So, we should try
not to perform statements that can increase the xmin on standby before
creating a logical slot. See the analysis sent in the previous email.

--
With Regards,
Amit Kapila.