Tom,
> It's possible that Jan's recent buffer-management improvements will
> change the story as of 7.5. I kinda doubt it myself, but it'd be worth
> re-running any experiments you've done when you start working with 7.5.
Yes, Jan has indicated to me that he expects to make much heavier use of
shared buffers under ARC. But 7.5 still seems to be too unstable for me to
test this assertion on a large database.
--
Josh Berkus
Aglio Database Solutions
San Francisco