Alvaro Herrera <alvherre@commandprompt.com> writes:
> After the patch we don't have any way to detect whether resowner.c has
> any snapshot still linked to. I assume there's no objection to adding a
> new entry point in resowner.c for this.
Hmm, that's a bit problematic because resowner.c doesn't have any global
notion of what resource owners exist. I think you still need to have
snapmgr.c maintain a list of all known snapshots. resowner.c can only
help you with tracking reference counts for particular snapshots.
regards, tom lane