Stuart Bishop <stuart@xxxxxxxxxxxxxxxx> writes: > I was wondering if the planner should be much more pessimistic, > trusting in Murphy's Law and assuming the worst case is the likely > case? Would this give me a much more consistent system? Well, it would give uniformly awful plans for cases where fast-start plans are actually useful ... and there are plenty. We do need to think of ways to account for risk, but I don't think that jamming the tiller all the way over is likely to be a net improvement. regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance