On Tue, May 10, 2016 at 3:29 AM, Kevin Grittner <kgri...@gmail.com> wrote:

>> * The results are a bit noisy, but I think in general this shows
>> that for certain cases there's a clearly measurable difference
>> (up to 5%) between the "disabled" and "reverted" cases. This is
>> particularly visible on the smallest data set.
> In some cases, the differences are in favor of disabled over
> reverted.

There were 75 samples each of "disabled" and "reverted" in the
spreadsheet.  Averaging them all, I see this:

reverted:  290,660 TPS
disabled:  292,014 TPS

That's a 0.46% overall increase in performance with the patch,
disabled, compared to reverting it.  I'm surprised that you
consider that to be a "clearly measurable difference".  I mean, it
was measured and it is a difference, but it seems to be well within
the noise.  Even though it is based on 150 samples, I'm not sure we
should consider it statistically significant.

Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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