On Sun, Jun 22, 2003 at 09:01:35PM -0700, Sean Chittenden wrote:
> As things stand, because O_DIRECT is an execution fast path through
> the vfs subsystem, I expect the speed difference to be greater on
> faster HDDs with high RPMs than on slower IDE machines at only
> 5400RPM... thus trivializing any benchmark I'll do on my laptop. And
> actually, if the app can't keep up with the disk, I bet the fs cache
> case will be faster. If the read()'s are able to keep up at the rate
> of the HDD, however, this could be a big win in the speed dept, but if
> things lag for an instant, the platter will have to make another
> rotation before the call comes back to the userland.
If it would help, I have a quad xeon-550 with a 4 drive raid5 and 2
drive mirror (all SCSI, 7200RPM I think) available.
--
Jim C. Nasby (aka Decibel!) [EMAIL PROTECTED]
Member: Triangle Fraternity, Sports Car Club of America
Give your computer some brain candy! www.distributed.net Team #1828
Windows: "Where do you want to go today?"
Linux: "Where do you want to go tomorrow?"
FreeBSD: "Are you guys coming, or what?"
---------------------------(end of broadcast)---------------------------
TIP 5: Have you checked our extensive FAQ?
http://www.postgresql.org/docs/faqs/FAQ.html
