V$GLOBAL_TRANSACTION

Columns
   ___________________________
 
   COUPLING
   REFCOUNT
   BRANCHES
   BRANCHID
   GLOBALID
   FORMATID
   STATE
   PREPARECOUNT
   FLAGS

Related Views:

V$SHARED_POOL_RESERVED 
V$SORT_SEGMENT 
V$SORT_USAGE 
V$STATNAME 
V$SYSSTAT 
V$SYSTEM_CURSOR_CACHE 
V$SYSTEM_EVENT 
V$TRANSACTION