CPU Costing

Setting up a demo for my students for the Fall with the new DBMS_XPLAN built-in package and I am getting the message:

"Note: cpu costing is off"

Which would be fine if I could figure out how to turn it on or off or set it.

A search of tahiti.oracle.com yields only two references to CPU Costing neither of which explains anything related other than a statement that it is user-defined ... user defined ... how?. And a check of v_$parameter indicates that it is not something modifyable in the init.ora.

Any help will be appreciated. Thanks.

-- 
Daniel Morgan
http://www.outreach.washington.edu/ext/certificates/oad/oad_crs.asp
http://www.outreach.washington.edu/ext/certificates/aoa/aoa_crs.asp
damorgan_at_x.washington.edu
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