V$TEMP_PING

Columns
   ___________________________
 
   FILE_NUMBER
   FREQUENCY
   X_2_NULL
   X_2_NULL_FORCED_WRITE
   X_2_NULL_FORCED_STALE
   X_2_S
   X_2_S_FORCED_WRITE
   X_2_SSX
   X_2_SSX_FORCED_WRITE
   S_2_NULL
   S_2_NULL_FORCED_STALE
   SS_2_NULL
   SS_2_RLS
   WRB
   WRB_FORCED_WRITE
   RBR
   RBR_FORCED_WRITE
   RBR_FORCED_STALE
   CBR
   CBR_FORCED_WRITE
   NULL_2_X
   S_2_X
   SSX_2_X
   NULL_2_S
   NULL_2_SS
   OP_2_SS

Related:

V$FILE_PING - Parallel server pings per file.