Michael Paquier <michael.paqu...@gmail.com> writes: > In short, autovacuum will need to scan by itself the VM of each > relation and decide based on that.
That seems like a worthwhile approach to pursue. The VM is supposed to be small, and if you're worried it isn't, you could sample a few pages of it. I do not think any of the ideas proposed so far for tracking the visibility percentage on-the-fly are very tenable. regards, tom lane -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers