new group commit behavior not helping?

On Saturday, March 31, 2012, Robert Haas <robertmhaas@gmail.com> wrote:
> Hoping to demonstrate the wonders of our new group commit code, I ran
> some benchmarks on the IBM POWER7 machine with synchronous_commit =
> on.  But, it didn't come out much better than 9.1.

Where I would expect (and have seen) much improvement is where #clients >>
#CPU.  Or "cores", whatever the term of art is.

Of course I've mostly seen this where CPU=1

It looks like in your case tps was still scaling with clients when you gave
up, so clients was probably too small.

Jeff