V$ROLLSTAT

Statistics for rollback segements.

Columns
   ___________________________
 
   USN
   LATCH
   EXTENTS
   RSSIZE
   WRITES
   XACTS
   GETS
   WAITS
   OPTSIZE
   HWMSIZE
   SHRINKS
   WRAPS
   EXTENDS
   AVESHRINK
   AVEACTIVE
   STATUS
   CUREXT
   CURBLK

Related:

V$ROLLNAME