> Kevin Grittner <kgri...@ymail.com> writes: >> Are we talking about the probe for the end (or beginning) of an >> index? If so, should we even care about visibility of the row >> related to the most extreme index entry? Should we even go to the >> heap during the plan phase? > > Consider the case where some transaction inserted a wildly out-of-range > value, then rolled back. If we don't check validity of the heap row, > we'd be using that silly endpoint value for planning purposes --- > indefinitely. That's not an improvement over the situation that the > probe is meant to fix.
Apparently it is waiting for locks, cant the check be make in a "non-blocking" way, so if it ends up waiting for a lock then it just assumes non-visible and moves onto the next non-blocking? This stuff is a 9.2 feature right? What was the original problem to be adressed? -- Jesper -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
