Tom,
> There's something awfully weird going on here. I was prepared to see
> no statistically-significant differences, but not multiple cases that
> seem to be going the "wrong direction".
There's a lot of variance in the tests. I'm currently running a variance
test battery on one machine to figure out why the results become so
variable when checkpointing is < 1 hour.
Actually, to cover all which is currently running:
machine1 & 3 wal_buffers scaling test
machine2 STP variance test
machine4 full_page_writes=false test
All of these should wind up in about 5 days, provided the STP doesn't crash
(not an insignificant concern).
--
--Josh
Josh Berkus
Aglio Database Solutions
San Francisco