Re: Introduce XID age and inactive timeout based replication slot invalidation - Mailing list pgsql-hackers

On Mon, Mar 25, 2024 at 12:43 PM shveta malik <shveta.malik@gmail.com> wrote:
>
> On Mon, Mar 25, 2024 at 11:53 AM shveta malik <shveta.malik@gmail.com> wrote:
> >
> > On Mon, Mar 25, 2024 at 10:33 AM shveta malik <shveta.malik@gmail.com> wrote:
> > >
> > > On Sun, Mar 24, 2024 at 3:06 PM Bharath Rupireddy
> > > <bharath.rupireddyforpostgres@gmail.com> wrote:
> > > >
> > > > I've attached the v18 patch set here.
>
> I have one concern, for synced slots on standby, how do we disallow
> invalidation due to inactive-timeout immediately after promotion?
>
> For synced slots, last_inactive_time and inactive_timeout are both
> set. Let's say I bring down primary for promotion of standby and then
> promote standby, there are chances that it may end up invalidating
> synced slots (considering standby is not brought down during promotion
> and thus inactive_timeout may already be past 'last_inactive_time').
>

This raises the question of whether we need to set
'last_inactive_time' synced slots on the standby?

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With Regards,
Amit Kapila.