Interesting, the documentation says the parameter is plsql_optimize_level (not optimiz*ation*), so which is it really? (I don't have a 10g instance to test with right now) -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Tim Onions Sent: Tuesday, January 10, 2006 8:08 AM To: k.sriramkumar@xxxxxxxxx Cc: Oracle-L@xxxxxxxxxxxxx Subject: Re: LIOs from 10g when using CPU_TEST.SQL Sriram Bingo! when I ALTER system set plsql_optimization_level=0; and re-run the results are near enough what I get on 9.2.0.7. I'll read the FM but any pointers as to why this reduces LIO would be greatly be appreciated. Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it. -- //www.freelists.org/webpage/oracle-l