While reading through the patch for what must be the 100th time by now,
it occurred to me that this comment in heap_xlog_freeze:
+ /*
+ * Freezing tuples does not require conflict processing
+ */
is plain wrong. In the master, we can freeze the xmin of a tuple that's
not yet visible to all read-only transactions in the standby. We do need
conflict processing there.
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com