On Mon, Oct 30, 2023 at 1:54 PM Guillaume Lelarge <guillaume@xxxxxxxxxxxx> wrote: > There are many reasons for a non-zero value: row updated or deleted in a rollbacked transaction, row updated or deleted in a current transaction, row locked by a SELECT FOR UPDATE, and perhaps others I don't remember right now. > Yes, clearly. What puzzled me was that such xmax was non-zero for a while (days). Inspecting pg_class.reloptions I found that accidentally (?) disabled autovacuum on such table, my fault! I should have checked pg_stat_user_tables at first! Thanks, Luca
