"Dann Corbit" <[EMAIL PROTECTED]> writes: > I also do not believe that there is any value that will be the right > answer. But a table of data might be useful both for people who want to > toy with altering the values and also for those who want to set the > defaults. I guess that at one time such a table was generated to > produce the initial estimates for default values.
Sir, you credit us too much :-(. The actual story is that the current default of 10 was put in when we first implemented stats histograms, replacing code that kept track of only a *single* most common value (and not very well, at that). So it was already a factor of 10 more stats than we had experience with keeping, and accordingly conservatism suggested not boosting the default much past that. So we really don't have any methodically-gathered evidence about the effects of different stats settings. It wouldn't take a lot to convince us to switch to a different default, I think, but it would be nice to have more than none. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers