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

Alvaro,

>> This sounds like extending Xid to 64 bits, without having to store the
>> high bits everywhere.  Was this discussed in the PGCon devs meeting?

Essentially, yes.

One of the main objections to raising XID to 64-bit has been the per-row
overhead.  But adding 4 bytes per page wouldn't be much of an impact.

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