On Wed, Feb 5, 2014 at 12:50 AM, Heikki Linnakangas <hlinnakan...@vmware.com> wrote: >> I think there's zero overlap. They're completely complimentary features. >> It's not like normal WAL records have an irrelevant volume. > > > Correct. Compressing a full-page image happens on the first update after a > checkpoint, and the diff between old and new tuple is not used in that case.
Uh, I really just meant that one thing that might overlap is considerations around the choice of compression algorithm. I think that there was some useful discussion of that on the other thread as well. -- Peter Geoghegan -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
