Arctic Toucan <arctic_toucan@xxxxxxxxxxx> writes: > My standard settings in the config file are: > autovacuum_freeze_max_age = 2,000,000,000 > vacuum_freeze_min_age = 100,000,000 Ah, well, there's the issue. It could be expected that no tuple freezing would happen before autovacuum_freeze_max_age. I'd take a zero off that value I think --- you're not leaving yourself a lot of daylight between freeze_max_age and wraparound. You could get away with that setting in a smaller database that didn't take so long to vacuum, but in a bigger one you want to freeze a bit more aggressively IMHO. regards, tom lane