Re: Snapshot export on a standby corrupts hint bits on subxact overflow

Pushed.

On Tue, Aug 25, 2026 at 5:32 AM Bertrand Drouvot
<bertranddrouvot(dot)pg(at)gmail(dot)com> wrote:
> On Mon, Aug 24, 2026 at 07:07:07PM -0400, Peter Geoghegan wrote:
> > On Wed, Jul 29, 2026 at 5:36 AM Bertrand Drouvot
> > <bertranddrouvot(dot)pg(at)gmail(dot)com> wrote:
> > > > 1/ In ExportSnapshot(), do not include recovery subxip entries and committed
> > > > child XIDs at or above xmax when counting and serializing them, so unnecessary
> > > > entries do not consume the limited recovery subxip capacity.
> >
> > That is a valid issue, but I wonder if it's worth including in a
> > back-patchable fix. Is the special case worth the added risk?
>
> Yeah, probably not. What about adding an XXX here:

In the committed version, we raise a specific ERROR when this happens.
I think it's unlikely that any user will ever see this ERROR, but it's
better to have it and not need it.

Thanks
--
Peter Geoghegan