select object_name,machine,s.sid,s.serial# 
from v$locked_object l,dba_objects o ,v$session s
where l.object_id = o.object_id and l.session_id=s.sid ;

alter system kill session '543,9206';

select a.spid,b.sid,b.serial#,b.username 
from v$process a,v$session b 
where a.addr=b.paddr 
and b.status='KILLED';

select b.spid,a.osuser,b.program 
from v$session a,v$process b 
where a.paddr=b.addr 
and a.sid=543