Re: Some belated patch review for "Buffers" explain analyze patch

Robert Haas <robertmhaas@gmail.com> writes:
> On Tue, Feb 9, 2010 at 3:26 PM, Josh Berkus <josh@agliodbs.com> wrote:
>> I'd prefer to have the average; it's very confusing to have an explain
>> row which has the cost per iteration, but the buffer usage per node.

> The cost per iteration thing is IMO one of the most confusing parts of
> the EXPLAIN output; I'm not really eager to see us replicate that
> elsewhere.

Well, if you want to put forward a proposal to get rid of that approach
entirely, go ahead.  But it doesn't seem like a good idea to me for
EXPLAIN to print some numbers according to one viewpoint and some
according to the other.
        regards, tom lane