Re: That EXPLAIN ANALYZE patch still needs work - Mailing list pgsql-hackers

From Tom Lane
Subject Re: That EXPLAIN ANALYZE patch still needs work
Date
Msg-id 22232.1149879770@sss.pgh.pa.us
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In response to Re: That EXPLAIN ANALYZE patch still needs work  (Greg Stark <gsstark@mit.edu>)
Responses Re: That EXPLAIN ANALYZE patch still needs work  (Greg Stark <gsstark@mit.edu>)
List pgsql-hackers
Greg Stark <gsstark@mit.edu> writes:
> To avoid user confusion it would reasonable to print out a line at the bottom:

>   Explain analyze profiling overhead removed: xxx ms

> That also gives the user feedback on how precise their explain analyze results
> are. If they see that the overhead being removed is as large as the timing
> remaining then they can realize that the results aren't especially precise. On
> the other hand if they see that the overhead being removed is small then they
> can be pretty confident in the precision of the results.

I would prefer to leave the numbers unmanipulated, because frankly I'd
have no confidence in the correction.  Perhaps we could put a note at the
bottom about "Estimated total profiling overhead: xxx ms".
        regards, tom lane


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