On Thu, Feb 11, 2010 at 7:39 AM, Bart Samwel <bart@samwel.tk> wrote: > Anyhow, I have no clue how much time the planner takes. Can anybody provide > any statistics in that regard?
It depends a great deal on the query, which is one of the things that makes implementing this rather challenging.
But I guess you can probably expect it to be on the same order for the same query in generic form and with filled-in parameters? Because that's the underlying assumption of the "ratio" criterion -- that re-planning with filled-in parameters takes about as much time as the initial planning run took.
