Re: Parallel Query Option

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 <kaygopal_at_yahoo.com> 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
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Yahoo! Auctions - buy the things you want at great
> > prices
> > http://auctions.yahoo.com/
> > --
> > Please see the official ORACLE-L FAQ:
> > http://www.orafaq.com
> > --
> > Author: CC Harvest
> > INET: ccharvest_at_yahoo.com
> >
> > Fat City Network Services -- (858) 538-5051 FAX:
> > (858) 538-5051
> > San Diego, California -- Public Internet
> > access / Mailing Lists
>
> --------------------------------------------------------------------
>
> > To REMOVE yourself from this mailing list, send an
> > E-Mail message
> > to: ListGuru_at_fatcity.com (note EXACT spelling of
> > 'ListGuru') and in
> > the message BODY, include a line containing: UNSUB
> > ORACLE-L
> > (or the name of mailing list you want to be removed
> > from). You may
> > also send the HELP command for other information
> > (like subscribing).
>
> _________________________________________________________
>
> > Do You Yahoo!?
> > Get your free @yahoo.com address at
> > http://mail.yahoo.com
> >
> > --
> > Please see the official ORACLE-L FAQ:
> > http://www.orafaq.com
> > --
> > Author: K Gopalakrishnan
> > INET: kaygopal_at_yahoo.com
> >
> > Fat City Network Services -- (858) 538-5051 FAX:
> > (858) 538-5051
> > San Diego, California -- Public Internet
> > access / Mailing Lists
>
> --------------------------------------------------------------------
>
> > To REMOVE yourself from this mailing list, send an
> > E-Mail message
> > to: ListGuru_at_fatcity.com (note EXACT spelling of
> > 'ListGuru') and in
> > the message BODY, include a line containing: UNSUB
> > ORACLE-L
> > (or the name of mailing list you want to be removed
> > from). You may
> > also send the HELP command for other information
> > (like subscribing).
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Auctions - buy the things you want at great prices
> http://auctions.yahoo.com/

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Jared Still
  INET: jkstill_at_cybcon.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).