pgbench performance is lagging compared to Linux and DragonflyBSD?

[Yuri]

On 11/05/2012 12:52, Garrett Cooper wrote:
> FWIW, I think that the last time scheduler benchmarks from anyone at 
> @FreeBSD.org (was kris@ the last one, or has flo@ run benchmarks since 

I myself ran the similar test on i7 920 (4 cores 8 threads) @ 2.67 24GB 
with 9.1-RC3 with all the same params except shmem size was 4GB, not 
6GB: http://i.imgur.com/mfnqr.png
In DragonflyBSD tests FreeBSD peaked at 96k tps. And my machine, with 
roughly 3X lesser power, peaked at 44.5k tps. So in my test BSD 
performed relatively better. And graph shape is more resembling 
linux/DragonflyBSD ones. It looks like in their test FreeBSD behaved in 
somewhat impaired way.

Any ideas what can I try to tune?

Yuri