From 532994299e2ff208a58376134fab75f5ae471e41 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Mon, 26 Nov 2012 15:55:43 -0500 Subject: Revert patch for taking fewer snapshots. This reverts commit d573e239f03506920938bf0be56c868d9c3416da, "Take fewer snapshots". While that seemed like a good idea at the time, it caused execution to use a snapshot that had been acquired before locking any of the tables mentioned in the query. This created user-visible anomalies that were not present in any prior release of Postgres, as reported by Tomas Vondra. While this whole area could do with a redesign (since there are related cases that have anomalies anyway), it doesn't seem likely that any future patch would be reasonably back-patchable; and we don't want 9.2 to exhibit a behavior that's subtly unlike either past or future releases. Hence, revert to prior code while we rethink the problem. --- doc/src/sgml/release-9.2.sgml | 7 ------- 1 file changed, 7 deletions(-) (limited to 'doc/src') diff --git a/doc/src/sgml/release-9.2.sgml b/doc/src/sgml/release-9.2.sgml index 840e7a7a0d9..c641606fd52 100644 --- a/doc/src/sgml/release-9.2.sgml +++ b/doc/src/sgml/release-9.2.sgml @@ -809,13 +809,6 @@ - - - Take fewer MVCC snapshots - (Robert Haas) - - - Make the number of CLOG buffers scale based on