On Tue, Nov 12, 2013 at 03:36:01PM -0800, David Johnston wrote: > Bruce Momjian wrote > > We just want to get across the MVCC concept in the intro --- we cover > > the snapshots later in the document. > > I just think we're being too vague here; and we are covering them in the > intro with the use of "some point in the past". > > IMO, the main point regarding MVCC is that every change in the system > creates a new record and causes a prior record to be invalidated at a > point-in-time. The combination of these two things increases concurrency > since you can create new records while people are still using the old ones. > One consequence, though, is that it is necessary for the user to decide at > what point in the timeline they want to view the database. > > Does this sound right?
I still do not see how this fits appropriately in the introduction. -- Bruce Momjian <[email protected]> http://momjian.us EnterpriseDB http://enterprisedb.com + Everyone has their own god. + -- Sent via pgsql-docs mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-docs
