select sid, serial#, last_call_et, status, program , username
from v$session
where sid
in ( select sid from v$lock where block=1)
alter system kill session '437,4315'
select
sid
,serial#
,username
,taddr
,s.status
,module
,action
from
v$session s
,v$locked_object l
where
s.sid = l.session_id