I'm speaking from experience with 9.1, I perhaps this has changed since (5+ years of dev!). I ran an experiment to demonstrate no XID reset on vacuum full: I r

I'm speaking from experience with 9.1, I perhaps this has changed since (5+ years of dev!). I ran an experiment to demonstrate no XID reset on vacuum full: I ran a test: XID age in callback 354015 (0% of max) task=# vacuum full callback; XID age in callback 354015 (0% of max) task=# vacuum freeze callback; XID age in callback 11 (0% of max)