On Thu, Mar 1, 2012 at 12:42 PM, Josh Berkus <j...@agliodbs.com> wrote: >>> And how would a DBA know that? >> >> We'd add a column to pg_class that tracks which page version is in use >> for each relation. > > So a relation can't have some pages in Version 9.2, and other pages in > version 9.3? How will this work for 2TB tables?
Not very well, but better than Tom's proposal to require upgrading the entire cluster in a single off-line operation. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers