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Home -> Community -> Mailing Lists -> Oracle-L -> RE: oica/oic
Sounds reasonable!! that's what Cary said don't do anything with little =
knowledge!! Thanks to all.
-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]
Sent: Monday, April 19, 2004 3:22 PM
To: oracle-l_at_freelists.org
Subject: RE: oica/oic
Changing O_I_C_A to lower than the default 100 will NOT make nested =
loops=20
and sb_file_sequential reads go faster. What it potentially, and most=20
likely, will do is make the optimizer use MORE nested loops and=20
db_file_sequential reads. that's what probably happened to some sql in =
your=20
batch jobs.
At 11:46 AM 4/19/2004, you wrote:
>Changed because too many db file seq reads with nested loops! thinking =
=3D
>that these params makes faster access to retrieve table data!!
>
>-----Original Message-----
>
>Before I used to have default settings of below params, But I changed =
to
>=3D3D3D
>40(oica) and 90. But my 1/2hour batch job taking 2 1/2hrs extra time =
=3D
>=3D3D3D
>because of these params!! Is there any particular reason behind it? =3D
>=3D3D3D
>Instead of improving performance its decreased drastically, So how to =
=3D
>=3D3D
>=3D3D3D
>arrive optimal values for these two params? Mine is oracle8174 with =3D
>=3D3D3D
>AIX51.
regards
Wolfgang Breitling
Centrex Consulting Corporation
www.centrexcc.com=20
-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html ----------------------------------------------------------------- ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request_at_freelists.org put 'unsubscribe' in the subject line. -- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------Received on Tue Apr 20 2004 - 08:39:08 CDT
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