On Thu, Mar 1, 2012 at 12:42 PM, Josh Berkus <josh@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