V$ROLLSTAT

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

Related Views:

V$ROLLNAME