RE: New standby_slot_names GUC in PG 17

On Saturday, June 22, 2024 5:47 PM Amit Kapila  wrote:
> 
> On Sat, Jun 22, 2024 at 1:49 AM Nathan Bossart
>  wrote:
> >
> > On Fri, Jun 21, 2024 at 03:50:00PM -0400, Tom Lane wrote:
> > >>>>> Allow specification of physical standbys that must be
> > >>>>> synchronized before they are visible to subscribers (Hou Zhijie,
> > >>>>> Shveta Malik)
> > >
> > > it seems like the name ought to have some connection to
> > > synchronization.  Perhaps something like "synchronized_standby_slots"?
> >
> > IMHO that might be a bit too close to synchronous_standby_names.
> >
> 
> Right, but better than the current one. The other possibility could be
> wait_for_standby_slots.

I agree the current name seems too generic and the suggested ' synchronized_standby_slots '
is better than the current one.

Some other ideas could be:

synchronize_slots_on_standbys: it indicates that the standbys that enabled
slot sync should be listed in this GUC.

logical_replication_wait_slots: it means the logical replication(logical
Walsender process) will wait for these slots to advance the confirm flush
lsn before proceeding.

Best Regards,
Hou zj