On 2012-11-19 10:46:37 -0800, Jeff Davis wrote: > On Tue, 2012-11-20 at 00:13 +0530, Atri Sharma wrote: > > > My mistake...I thought we were more concerned about the cost of > > locking. > > > > I agree, locking many data pages simultaneously could be hazardous. > > > > This requires more thought.Maybe removing PD_ALL_VISIBLE isnt such a > > great idea after all... > > As I said elsewhere in the thread, I'm not planning to introduce any > additional locking. There is already precedent in IndexOnlyNext.
Yea, but that precedent is only valid because IOS does check for a MVCC snapshots. Also it doesn't set anything. Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
