<br /><br />On Saturday, March 31, 2012, Robert Haas <<a
href="mailto:robertmhaas@gmail.com">robertmhaas@gmail.com</a>>wrote:<br />> Hoping to demonstrate the wonders of
ournew group commit code, I ran<br />> some benchmarks on the IBM POWER7 machine with synchronous_commit =<br />
>on. But, it didn't come out much better than 9.1. <br /><br />Where I would expect (and have seen) much
improvementis where #clients >> #CPU. Or "cores", whatever the term of art is.<br /><br />Of course I've mostly
seenthis where CPU=1<br /><br />It looks like in your case tps was still scaling with clients when you gave up, so
clientswas probably too small.<br /><br />Jeff