"Nick Fankhauser" <nickf(at)ontko(dot)com> writes:
> I'm departing in three ways from the simple IDE
> model that (I presume) the default random page cost of 4 is based on- The
> disks are SCSI & RAID and the FS would be different.
Actually, the default 4 is based on experiments I did quite awhile back
on HPUX (with a SCSI disk) and Linux (with an IDE disk, and a different
filesystem). I didn't see too much difference between 'em. RAID might
alter the equation, or not.
regards, tom lane