Johathan, Thank you for your article. I am still unclear though why in my example the value of allocated parameter did not change even though I have specified different tablespaces with varying next_Extent values (from 128K to 50M). All these tablespaces a local with uniform extent value. I expected the allocated value to differ based on the size of an extent. IS that incorrect? thank you Gene Gurevich Phone 224-405-4079 Database Engineering and Operations Enterprise Data Management (EDM) Discover Financial Services "Jonathan Lewis" <jonathan@jlcomp. demon.co.uk> To Sent by: <oracle-l@xxxxxxxxxxxxx> oracle-l-bounce@f cc reelists.org Subject Re: create_index_cost procedure 07/02/2009 04:17 PM Please respond to jonathan@xxxxxxxx emon.co.uk Answers here. http://jonathanlewis.wordpress.com/2009/05/22/index-size/ Regards Jonathan Lewis http://jonathanlewis.wordpress.com Author: Cost Based Oracle: Fundamentals http://www.jlcomp.demon.co.uk/cbo_book/ind_book.html The Co-operative Oracle Users' FAQ http://www.jlcomp.demon.co.uk/faq/ind_faq.html ----- Original Message ----- From: <genegurevich@xxxxxxxxxxxx> To: <oracle-l@xxxxxxxxxxxxx> Sent: Thursday, July 02, 2009 7:55 PM Subject: create_index_cost procedure > Hello everybody: > > I am using create_index_cost procedure (oracle 10.2.0.3) to estimate the > size of a future index and find an appropriate tablespace parameters for > it. > Here is my code: > -- //www.freelists.org/webpage/oracle-l Please consider the environment before printing this email. -- //www.freelists.org/webpage/oracle-l