On Tue, Oct 14, 2014 at 7:55 PM, Andres Freund <
andres@2ndquadrant.com> wrote:
>
> On 2014-10-14 09:30:58 -0400, Robert Haas wrote:
> > A few years ago I started working on a concurrent hash table for
> > PostgreSQL. The hash table part of it worked, but I never did
> > anything with it, really. Amit mentioned to me earlier this week that
> > he was seeing contention inside the dynahash machinery, which inspired
> > me to go back and update the patch.
>
> Interestingly I've benchmarked similar loads, even on the same machine
> as Amit,
There is one catch here, for these profiles I am using Power-8 m/c
and the load is slightly higher (5000 scale factor).