On Tue, Nov 12, 2013 at 08:39:35PM -0500, Bruce Momjian wrote: > > My specific wording is incoherent mostly because it really belongs to a > > larger corpus that currently exists only in my head. > > Oh, OK, it sounds fine. The user really doesn't choose what timeline to > see --- rather, it is the current xid at the time they take their > snapshot and other running xids that controls that. You can control > your transaction isolation level, but that only controls how often you > take snapshots.
[ moved to hackers ] Actually, it would be possible to allow snapshots that are equal to the earliest active snapshot for the current database. I don't think it would be useful in production, but perhaps for debugging or some disaster recovery. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + Everyone has their own god. + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
