V$SHARED_SERVER

Columns
   ___________________________
 
   NAME
   PADDR
   STATUS
   MESSAGES
   BYTES
   BREAKS
   CIRCUIT
   IDLE
   BUSY
   REQUESTS

Related:

V$CIRCUIT 
V$DISPATCHER 
V$DISPATCHER_RATE 
V$MTS
V$QUEUE 
V$REQDIST 
V$THREAD