V$SESS_IO

Columns
   ___________________________
 
   SID
   PHYSICAL_READS
   BLOCK_CHANGES
   BLOCK_GETS
   CONSISTENT_CHANGES
   CONSISTENT_GETS

Related Views:

V$ACCESS
V$MYSTAT 
V$PROCESS 				
V$SESSION 
V$SESSION_CONNECT_INFO 
V$SESSION_CURSOR_CACHE 
V$SESSION_EVENT 
V$SESSION_LONGOPS 
V$SESSION_OBJECT_CACHE 
V$SESSION_WAIT 
V$SESSTAT