Re: Idea for getting rid of VACUUM FREEZE on cold pages - Mailing list pgsql-hackers

> Correct. The problem actually are aborted transactions. Just because an
> XID is really old doesn't mean it was committed.

Yes, that's the main issue with my idea; XIDs which fell off the CLOG
would become visible even if they'd aborted.

Do we get a bit in the visibility map for a page which has aborted
transaction rows on it?

--                                  -- Josh Berkus                                    PostgreSQL Experts Inc.
                        http://www.pgexperts.com