sum of rollback segments for any specific session

I'd like to be able to see/report how much rollback space any specific session is currently consuming.

I have FOUR different Oracle manuals open on my desk and still can't see any way to link any particular RBS to any specific Oracle SID/SERIAL#. In this case I failed at RTFM or just have not found the right manual.

If anyone knows how to do this, I'd appreciate it if they'd share their knowledge with me.

TIA!

-- 
Charlie Mengler               Maintenance Warehouse  
charliem_at_mwh.com              10641 Scripps Summit Ct   
858-831-2229                  San Diego, CA 92131    
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