On Fri, Oct 20, 2006 at 05:37:48PM +0200, Zeugswetter Andreas ADI SD wrote:
> Yup, that would be the scenario where it helps (provided that you have
> a smart disk or a disk array and an intelligent OS aio implementation).
> It would be used to fetch the data pages pointed at from an index leaf,
> or the next level index pages.
> We measured the IO bandwidth difference on Windows with EMC as beeing
> nearly proportional to parallel outstanding requests up to at least
Measured it using what? I was under the impression only one
proof-of-implementation existed, and that the scenarios and
configuration of the person who wrote it, did not show significant
improvement.
You have PostgreSQL on Windows with EMC with async I/O support to
test with?
Cheers,
mark
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