Re: Where does the time go? - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Where does the time go?
Date
Msg-id 17991.1143298851@sss.pgh.pa.us
Whole thread Raw
In response to Re: Where does the time go?  (Simon Riggs <simon@2ndquadrant.com>)
Responses Re: Where does the time go?  (Martijn van Oosterhout <kleptog@svana.org>)
List pgsql-hackers
Simon Riggs <simon@2ndquadrant.com> writes:
> I would like to implement an additional mode for EXPLAIN ANALYZE that
> does no timing instrumentation at all. Most of the time just looking for
> differences between estimated and actual row counts is all you need.

I don't really agree with that premise ... without timings, you cannot
for instance tell if the planner has over/underestimated the cost of an
index fetch.
        regards, tom lane


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