No momento que estiver lockado, efetue o seguinte select:
select d.lock_type,
d.mode_held,
d.mode_requested,
s1.SID sid_aguardando,
s1.SERIAL# serial_aguardando,
s1.USERNAME username_aguardando,
s1.MACHINE machine_aguardando,
s1.TERMINAL termina_aguardando,
s1.PROGRAM program_aguardando,
s1.module module_aguardando,
s2.SID sid_lockando,
s2.SERIAL# serial_lockando,
s2.USERNAME usernam_lockando,
s2.MACHINE machine_lockando,
s2.TERMINAL terminal_lockando,
s2.PROGRAM program_lockando,
s2.MODULE module_lockando,
do.object_name
from dba_waiters d,
v$session s1, --sessão aguardando
v$session s2, --sesão lockando
v$locked_object lo,
dba_objects do
where d.waiting_session = s1.SID
and d.holding_session = s2.SID
and s1.SID = lo.SESSION_ID
and lo.OBJECT_ID = do.object_id
and mode_held = 'Exclusive'
Vlw Leonardo Litz