> 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

-- 
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers

Reply via email to