Hi, On Wed, Aug 12, 2026 at 05:00:00PM -0700, Bharath Rupireddy wrote: > I believe this can happen in practice (as explained above). IMHO, XID > age based slot invalidation must invalidate the synced slot on the > standby
Yeah, I agree. Keeping the exemption for idle_replication_slot_timeout but removing it from CanInvalidateXidAgedSlot() makes sense to me. One nuance about 3/ though: the synced slot is current in that case and the stale catalog_xmin is stored on the primary's physical slot. Therefore, the check for aged synced slots would not address this case: the synced slot is not aged, so it would not be invalidated. Worth adding a test with an actual synced slot, including checking that its invalidation releases the feedback horizon on the primary? Regards, -- Bertrand Drouvot PostgreSQL Contributors Team RDS Open Source Databases Amazon Web Services: https://aws.amazon.com
