Kevin Kempter <kevink(at)consistentstate(dot)com> writes:
> INFO: "action_rollup_notifier": found 0 removable, 34391214 nonremovable row
> versions in 152175 pages
> DETAIL: 22424476 dead row versions cannot be removed yet.
> Anyone have any suggestions per why these rows cannot be removed yet?
You've got an open transaction that's older than the one that deleted
those rows (or at least started before the latter committed).
pg_stat_activity might be helpful in fingering the culprit.
regards, tom lane