Re: Introduce XID age and inactive timeout based replication slot invalidation

Hi,

On Sun, Mar 03, 2024 at 03:44:34PM -0600, Nathan Bossart wrote:
> On Sun, Mar 03, 2024 at 11:40:00PM +0530, Bharath Rupireddy wrote:
> > On Sat, Mar 2, 2024 at 3:41 AM Nathan Bossart <nathandbossart(at)gmail(dot)com> wrote:
> >> Would you ever see "conflict" as false and "invalidation_reason" as
> >> non-null for a logical slot?
> >
> > No. Because both conflict and invalidation_reason are decided based on
> > the invalidation reason i.e. value of slot_contents.data.invalidated.
> > IOW, a logical slot that reports conflict as true must have been
> > invalidated.
> >
> > Do you have any thoughts on reverting 007693f and introducing
> > invalidation_reason?
>
> Unless I am misinterpreting some details, ISTM we could rename this column
> to invalidation_reason and use it for both logical and physical slots. I'm
> not seeing a strong need for another column.

Yeah having two columns was more for convenience purpose. Without the "conflict"
one, a slot conflicting with recovery would be "a logical slot having a non NULL
invalidation_reason".

I'm also fine with one column if most of you prefer that way.

Regards,

--
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com