Re: Automagic tuning

Josh Berkus <josh@agliodbs.com> writes:
>> I would like something that really measures values like random_page_cost
>> or cpu_tuple_cost that are hardware dependent.
>>
>> I assume such thing does not exist?

> Nope.  You gotta whip out your calculator and run some queries.

Preferably a whole lot of queries.  All the measurement techniques I can
think of are going to have a great deal of noise, so you shouldn't
twiddle these cost settings based on just a few examples.

            regards, tom lane