Re: Synchronizing slots from primary to standby

On Mon, Apr 8, 2024 at 12:19 PM Zhijie Hou (Fujitsu)
<houzj.fnst@fujitsu.com> wrote:
>
> On Saturday, April 6, 2024 12:43 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
> > On Fri, Apr 5, 2024 at 8:05 PM Bertrand Drouvot
> > <bertranddrouvot.pg@gmail.com> wrote:
> >
> > Yeah, that could be the first step. We can probably add an injection point to
> > control the bgwrite behavior and then add tests involving walsender
> > performing the decoding. But I think it is important to have sufficient tests in
> > this area as I see they are quite helpful in uncovering the issues.
>
> Here is the patch to drop the subscription in the beginning so that the
> restart_lsn of the lsub1_slot won't be advanced due to concurrent
> xl_running_xacts from bgwriter. The subscription will be re-created after all
> the slots are sync-ready. I think maybe we can use this to stabilize the test
> as a first step and then think about how to make use of injection point to add
> more tests if it's worth it.
>

Pushed.

--
With Regards,
Amit Kapila.