On 13 January 2012 15:21, Robert Haas <robertmhaas@gmail.com> wrote:
> I think that people who are using index-only scans are going to want
> some way to find out the degree to which the scans are in fact
> index-only.
>
> So here's a 5-line patch that adds the number of heap fetches to the
> EXPLAIN ANALYZE output. This might not be all the instrumentation
> we'll ever want here, but I think we at least want this much.
Good idea. The fact that that information wasn't available did bother me.
--
Peter Geoghegan http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training and Services