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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Manual vs Auto PGA
Hi,
Depends also on workarea_size_policy manual or auto, see manuals for that
I had and know of other problems when using auto when PL/SQL arrays are used
Which version are u using?
Regards,
Jeoren
Van: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] Namens Lawie, Duncan
Verzonden: Tuesday, January 02, 2007 15:29
Aan: 'deepak_blr_at_youtele.com'; 'ORACLE-L'
Onderwerp: RE: Manual vs Auto PGA
Individual sessions can't normally take more than 5% of the total value of pga_aggregate_target.
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of blr_dba
Sent: 30 December 2006 15:01
To: 'ORACLE-L'
Subject: Manual vs Auto PGA
Hi Gurus.
My query is using big hash joins. I had set PGA_AGGREGATE_TARGET=4GB. But when I observed the pga statistics, I found that the max. pga used by a session is 300M. That was the only user session running.
Later I used manual PGA and defined the hash_area_size=2GB explicitly. Then oracle started using the whole hash_area and the query ran faster.
Would like to know why oracle did not allocated teh desired hash_area_size when I used auto PGA?
Are there any situations where we should use manual pga?
Anything I missed?
Deep
http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html
-- http://www.freelists.org/webpage/oracle-lReceived on Tue Jan 02 2007 - 09:19:06 CST
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