Re: Why "Separating Data and Indexes improves performance" is a myth?
- From: Paul Drake <discgolfdba@xxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Fri, 23 Apr 2004 18:15:07 -0700 (PDT)
--- Jared.Still@xxxxxxxxxxx wrote:
> What matters is the performance of your system under
> load. If you have 10
> disks in
> a RAID 0 with all indexes and data residing on it
> and the performance is
> somewhat
> lackluster, splitting those disks into two 5 disk
> RAID 0 drives and
> physically separating
> the indexes and data will not improve performance.
>
OOH - odd number of disks for RAID 0 >> BRAIN HURTS.
These days, I can only do math in my head in powers of
2.
2 advil plus a dose of the paper at hotsos on
"Aligning Oracle Blocks with Hardware Stripe
Boundaries".
RAID 1 ( 2 )
RAID 10 ( 4, 8)
RAID 0 ( 1, 2, 4, 8 )
Far better to use that odd number for a hotspare
(although a hot spare for RAID 0 is not really
worthwhile).
RAID F ... sorry, can't do it.
Pd
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