No need to worry about striping from Oracle if your
data is on a logical volume of multiple drives.
Say your volume is made of of 5 physical drives, you
could use a parallel degree of up to 10 on a partitioned
table.
WIth only 4 cpu's though, that's not advisable. It also
depends on the load your system currently has. If your
CPU's are currently averaging over 60% busy, I wouldn't
be too anxious to add PQO to the mix.
It will also eat up a lot of memory, upto
( number_of_cpus * parallel_degree ) * 10 - 15 meg of RAM.
If you can experiment with this at a time when the users will let
you have it ( like the weekend. sorry :) you can alter the parallel
degree on the table in question and fire of some queries, and
then compare performance to the results obtained without
PQO.
Assuming your box has the resources to deal with PQO of course.
Jared
On Friday 20 April 2001 12:45, CC Harvest wrote:
> I have 29 physical disks on Sun Solaris 2.8(just
> talked
> to SA). And they are all striped. But I have only 1
> logical drive. So I cannot stripe on the Oracle side.
> I have 4 CPUs. And I have a big database with 20GB.
> And that's a static table, but we have intensive
> selects on this one(It's our customer info table, and
> we have to do segmentation from different dimension).
>
> Thank you all for the input.
>
> Chris Harvest.
>
> --- K Gopalakrishnan <[EMAIL PROTECTED]> wrote:
> > Hi !
> >
> > Can you tell me how many CPUs you have and
> > the number of PHYSICAL DISKs
> >
> >
> > -----Original Message-----
> > Sent: Friday, April 20, 2001 9:41 PM
> > To: Multiple recipients of list ORACLE-L
> >
> >
> > I am trying to tune a 30GB database and to configure
> > the initSID.ora files to use PQO. From my
> > understand,
> > they are some back requirements: multiple CPUs of
> > the
> > machine, stripe the tablespace datafiles, etc. If I
> > only have 3 disk drive, do I have to stripe the
> > datafiles to 3 disks, index files to 3 disks? Anyone
> > has the real example of initSID.ora file to share?
> >
> > Thanks,
> >
> > Chris Harvest
> >
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> > Author: CC Harvest
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