Greg Smith <gsmith@xxxxxxxxxxxxx> writes: > On Wed, 20 Jun 2007, Mike Benoit wrote: >> I don't think something like this would be very difficult at all to >> write > Here I just smile and say that proves you've never tried to write one :) I'm with Greg on this. It's not that easy to optimize in a multi-parameter space even if all conditions are favorable, and they never are. I think what would be much more useful in the long run is some serious study of the parameters themselves. For instance, random_page_cost is a self-admitted oversimplification of reality. We know that good settings for it depend critically on how large your DB is relative to your RAM; which means there are at least two parameters there, but no one's done any serious thinking about how to disentangle 'em. regards, tom lane
