Re: Linux: more cores = less concurrency.

--- On Tue, 12/4/11, Merlin Moncure <mmoncure(at)gmail(dot)com> wrote:

> >>> Can we see some iobound and cpubound pgbench
> runs on both
> >>> servers?
> >>>
> >>
> >> Of course, I'll post when I've gotten to that.
> >
> > Ok, there's no writing going on -- so the i/o tets
> aren't necessary.
> > Context switches are also not too high -- the problem
> is likely in
> > postgres or on your end.
> >
> > However, I Would still like to see:
> > pgbench select only tests:
> > pgbench -i -s 1
> > pgbench -S -c 8 -t 500
> > pgbench -S -c 32 -t 500
> > pgbench -S -c 80 -t 500
> >
> > pgbench -i -s 500
> > pgbench -S -c 8 -t 500
> > pgbench -S -c 32 -t 500
> > pgbench -S -c 80 -t 500
> >
> > write out bench.sql with:
> > begin;
> > select * from heavy_seat_function();
> > select * from heavy_seat_function();
> > commit;
> >
> > pgbench -n bench.sql -c 8 -t 500
> > pgbench -n bench.sql -c 8 -t 500
> > pgbench -n bench.sql -c 8 -t 500
>
> whoops:
> pgbench -n bench.sql -c 8 -t 500
> pgbench -n bench.sql -c 32 -t 500
> pgbench -n bench.sql -c 80 -t 500
>
> merlin
>

Right, here they are:

http://www.privatepaste.com/3dd777f4db