Any reason not to do CPU COSTING as described by Jonathan Lewis? "You can enable cpu_costing simply by collecting system_statistics for an appropriate period of time with the dbms_stats package. This records in the table sys.aux_stats$ values for: assumed CPU speed in MHz single block read time in milliseconds multiblock read time in milliseconds typical achieved multiblock read." Full article @ http://www.jlcomp.demon.co.uk/faq/cost_9.html Thanks ********************************************************************** The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please re-send this communication to the sender and delete the original message or any copy of it from your computer system. Thank You. ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------