Pavel Stehule <pavel.steh...@gmail.com> writes:
> 2011/12/23 Tom Lane <t...@sss.pgh.pa.us>:
>> Tomas Vondra <t...@fuzzy.cz> writes:
>>> The motivation for this patch was that collection timing data often
>>> causes performance issues and in some cases it's not needed. But is this
>>> true for row counts?

>> Perhaps more to the point, is there a use case for collecting timing
>> data without row counts?  I find it hard to visualize a valid reason.

> yes - a searching of bad prediction

No, because timing alone proves nothing at all.  The machine could just
have been overloaded.

                        regards, tom lane

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