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Message Posted: Tue, 11 Jan 2005 @ 19:22:41 GMT


     
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Subj:   How confident is "High Confidence"
 
From:   Anomy Anom

<-- Anonymously Posted: Tuesday, January 11, 2005 13:04 -->

Explains indicate confidence levels of target cardinality and cost (time) estimates. Can these be equated to probability of correctness, such as High confidence is 90%, Low is 50% and No confidence 25%? Can I also convert the cost and cardinality shown by explains into CPU time and IO's approximately?

The above information would help me find the machine resource saved when a query is rejected by query Resource rule (TDQM). They are not standard queries so that we can multiply by the number of rejections for a standard query.


Thanks.



     
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