[EM] how is "Current SQL Response Time" expressed ?
                    
Hello everyone,  I could not find the info in the object anywhere ... 
                The question is : 
 How is the metric Current SQL Response Time shown in the enterprise manager 11g  expressed ? Milliseconds or Microseconds ? 
How is precisely defined ? And how can I get the value from SQL ? 
I only found this in official docs: 
... that is not much 
Thank you in advance, 
Paolo 
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