On Aug 30, 2013, at 11:49 PM, Andres Freund <and...@2ndquadrant.com> wrote: > Even better explanation: The merge append is some steps below a LockRows > node, so the number of rescans might depend on the concurrency because > we'll do the EvalPlanQual dance on a concurrent row update. > > Terje, do you use read committed or repeatable read/serializable?
Using Read Committed. Terje
