Rem OWNED shows no. of clients currently connected
Rem 
select name "NAME", owned,substr(network,1,15) "PROTOCOL",                   
status "STATUS", (busy/(busy + idle)) * 100 "%TIME BUSY"               
from v$dispatcher
/

Rem Queue wait time 
select paddr,type,queued,wait,totalq,                               
decode(totalq,0,0,wait/totalq) "AVG WAIT" from v$queue;