On 2015-08-07 20:17:28 +0530, Amit Kapila wrote:
> On Fri, Aug 7, 2015 at 8:00 PM, Jesper Pedersen <jesper.pedersen@redhat.com>
> wrote:
>
> > On 08/07/2015 12:41 AM, Amit Kapila wrote:
> >
> >> On Thu, Aug 6, 2015 at 9:36 PM, Robert Haas <robertmhaas@gmail.com>
> >> wrote:
> >>
> >>>
> >>>
> >>> OK, committed.
> >>>
> >>>
> >> Thank you.
> >>
> >>
> > Fyi, there is something in pgbench that has caused a testing regression -
> > havn't tracked down what yet.
> >
> > Against 9.6 server (846f8c9483a8f31e45bf949db1721706a2765771)
> >
> > 9.6 pgbench:
> > ------------
> > progress: 10.0 s, 53525.0 tps, lat 1.485 ms stddev 0.523
> > progress: 20.0 s, 15750.6 tps, lat 5.077 ms stddev 1.950
> > ...
> > progress: 300.0 s, 15636.9 tps, lat 5.114 ms stddev 1.989
> >
> > 9.5 pgbench:
> > ------------
> > progress: 10.0 s, 50119.5 tps, lat 1.587 ms stddev 0.576
> > progress: 20.0 s, 51413.1 tps, lat 1.555 ms stddev 0.553
> > ...
> > progress: 300.0 s, 52951.6 tps, lat 1.509 ms stddev 0.657
> >
> >
> > Both done with -c 80 -j 80 -M prepared -P 10 -T 300.
> >
>
> I will look into it.
> Could you please share some of the settings used for test like
> scale_factor in pgbench and shared_buffers settings or if you
> have changed any other default setting in postgresql.conf?
FWIW, I've seen regressions on my workstation too. I've not yet had time
to investigate.
Andres
