LOCKS :
To Checks the Locks @ Instance Level:
set linesize 300
set pagesize 300
SELECT lh.inst_id Locking_Inst, lh.sid Locking_Sid, lw.inst_id Waiting_Inst,
lw.sid Waiter_Sid,
decode ( lh.type, 'MR', 'Media_recovery', 'RT', 'Redo_thread', 'UN', 'User_name', 'TX', 'Transaction',
'TM', 'Dml', 'UL', 'PLSQL User_lock', 'DX', 'Distrted_Transaxion', 'CF', 'Control_file', 'IS',
'Instance_state', 'FS', 'File_set', 'IR', 'Instance_recovery', 'ST', 'Diskspace Transaction',
'IV', 'Libcache_invalidation', 'LS', 'LogStaartORswitch', 'RW', 'Row_wait', 'SQ', 'Sequence_no', 'TE', '
Extend_table', 'TT', 'Temp_table', 'Nothing-' ) Waiter_Lock_Type,
decode ( lw.request, 0, 'None', 1, 'NoLock', 2, 'Row-Share', 3, 'Row-Exclusive', 4,
'Share-Table', 5, 'Share-Row-Exclusive', 6, 'Exclusive', 'Nothing-' ) Waiter_Mode_Req
FROM gv$lock lw, gv$lock lh
WHERE lh.id1=lw.id1 AND lh.id2=lw.id2
AND lh.request=0 AND lw.lmode=0
AND (lh.id1,lh.id2) in
( SELECT id1,id2 FROM gv$lock WHERE request=0 INTERSECT SELECT id1,id2 FROM gv$lock WHERE lmode=0 )
/
Above query gives you the SID's of the Locks.
Now U need to get the SPID's/Unix OS ID's for the same using the below Query:
select spid from v$process where addr
=(select paddr from v$session where sid =&sid)
/
Now, give the SPID as input for the next query to get detailed info of the Locks.
Details Like :
SID, Serial#
Session Info : Is that a Form Session or SQL
User Info
STATUS : Active / Inactive
set echo off
set serveroutput on size 999999
set verify off
set feedback off
accept uxproc prompt 'Enter Unix process id: '
DECLARE
v_sid number;
vs_cnt number;
s sys.v_$session%ROWTYPE;
p sys.v_$process%ROWTYPE;
cursor cur_c1 is select sid from sys.v_$process p, sys.v_$session s where p.addr = s.paddr and (p.spid = &uxproc or s.process = '&uxproc');
BEGIN
dbms_output.put_line('=====================================================================');
select nvl(count(sid),0) into vs_cnt from sys.v_$process p, sys.v_$session s where p.addr = s.paddr and (p.spid = &uxproc or s.process = '&uxproc');
dbms_output.put_line(to_char(vs_cnt)||' sessions were found with '||'&uxproc'||' as their unix process id.');
dbms_output.put_line('=====================================================================');
open cur_c1;
LOOP
FETCH cur_c1 INTO v_sid;
EXIT WHEN (cur_c1%NOTFOUND);
select * into s from sys.v_$session where sid = v_sid;
select * into p from sys.v_$process where addr = s.paddr;
dbms_output.put_line('SID/Serial : '|| s.sid||','||s.serial#);
dbms_output.put_line('Foreground : '|| 'PID: '||s.process||' - '||s.program);
dbms_output.put_line('Shadow : '|| 'PID: '||p.spid||' - '||p.program);
dbms_output.put_line('Terminal : '|| s.terminal || '/ ' || p.terminal);
dbms_output.put_line('OS User : '|| s.osuser||' on '||s.machine);
dbms_output.put_line('Ora User : '|| s.username);
dbms_output.put_line('Details : '|| s.action||' - '||s.module);
dbms_output.put_line('Status Flags: '|| s.status||' '||s.server||' '||s.type);
dbms_output.put_line('Tran Active : '|| nvl(s.taddr, 'NONE'));
dbms_output.put_line('Login Time : '|| to_char(s.logon_time, 'Dy HH24:MI:SS'));
dbms_output.put_line('Last Call : '|| to_char(sysdate-(s.last_call_et/60/60/24), 'Dy HH24:MI:SS') || ' - ' || to_char(s.last_call_et/60, '99990.0') || ' min');
dbms_output.put_line('Lock/ Latch : '|| nvl(s.lockwait, 'NONE')||'/ '||nvl(p.latchwait, 'NONE'));
dbms_output.put_line('Latch Spin : '|| nvl(p.latchspin, 'NONE'));
dbms_output.put_line('Current SQL statement:');
for c1 in ( select * from sys.v_$sqltext where HASH_VALUE = s.sql_hash_value order by piece)
loop
dbms_output.put_line(chr(9)||c1.sql_text);
end loop;
dbms_output.put_line('Previous SQL statement:');
for c1 in ( select * from sys.v_$sqltext where HASH_VALUE = s.prev_hash_value order by piece)
loop
dbms_output.put_line(chr(9)||c1.sql_text);
end loop;
dbms_output.put_line('Session Waits:');
for c1 in ( select * from sys.v_$session_wait where sid = s.sid)
loop
dbms_output.put_line(chr(9)||c1.state||': '||c1.event);
end loop;
-- dbms_output.put_line('Connect Info:');
-- for c1 in ( select * from sys.v_$session_connect_info where sid = s.sid) loop
-- dbms_output.put_line(chr(9)||': '||c1.network_service_banner);
-- end loop;
dbms_output.put_line('Locks:');
for c1 in ( select /*+ RULE */ decode(l.type,
-- Long locks
'TM', 'DML/DATA ENQ', 'TX', 'TRANSAC ENQ',
'UL', 'PLS USR LOCK',
-- Short locks
'BL', 'BUF HASH TBL', 'CF', 'CONTROL FILE',
'CI', 'CROSS INST F', 'DF', 'DATA FILE ',
'CU', 'CURSOR BIND ',
'DL', 'DIRECT LOAD ', 'DM', 'MOUNT/STRTUP',
'DR', 'RECO LOCK ', 'DX', 'DISTRIB TRAN',
'FS', 'FILE SET ', 'IN', 'INSTANCE NUM',
'FI', 'SGA OPN FILE',
'IR', 'INSTCE RECVR', 'IS', 'GET STATE ',
'IV', 'LIBCACHE INV', 'KK', 'LOG SW KICK ',
'LS', 'LOG SWITCH ',
'MM', 'MOUNT DEF ', 'MR', 'MEDIA RECVRY',
'PF', 'PWFILE ENQ ', 'PR', 'PROCESS STRT',
'RT', 'REDO THREAD ', 'SC', 'SCN ENQ ',
'RW', 'ROW WAIT ',
'SM', 'SMON LOCK ', 'SN', 'SEQNO INSTCE',
'SQ', 'SEQNO ENQ ', 'ST', 'SPACE TRANSC',
'SV', 'SEQNO VALUE ', 'TA', 'GENERIC ENQ ',
'TD', 'DLL ENQ ', 'TE', 'EXTEND SEG ',
'TS', 'TEMP SEGMENT', 'TT', 'TEMP TABLE ',
'UN', 'USER NAME ', 'WL', 'WRITE REDO ',
'TYPE='||l.type) type,
decode(l.lmode, 0, 'NONE', 1, 'NULL', 2, 'RS', 3, 'RX',
4, 'S', 5, 'RSX', 6, 'X',
to_char(l.lmode) ) lmode,
decode(l.request, 0, 'NONE', 1, 'NULL', 2, 'RS', 3, 'RX',
4, 'S', 5, 'RSX', 6, 'X',
to_char(l.request) ) lrequest,
decode(l.type, 'MR', o.name,
'TD', o.name,
'TM', o.name,
'RW', 'FILE#='||substr(l.id1,1,3)||
' BLOCK#='||substr(l.id1,4,5)||' ROW='||l.id2,
'TX', 'RS+SLOT#'||l.id1||' WRP#'||l.id2,
'WL', 'REDO LOG FILE#='||l.id1,
'RT', 'THREAD='||l.id1,
'TS', decode(l.id2, 0, 'ENQUEUE', 'NEW BLOCK ALLOCATION'),
'ID1='||l.id1||' ID2='||l.id2) objname
from sys.v_$lock l, sys.obj$ o
where sid = s.sid
and l.id1 = o.obj#(+) )
loop
dbms_output.put_line(chr(9)||c1.type||' H: '||c1.lmode||' R: '||c1.lrequest||' - '||c1.objname);
end loop;
dbms_output.put_line('=====================================================================');
END LOOP;
dbms_output.put_line(to_char(vs_cnt)||' sessions were found with '||'&uxproc'||' as their unix process id.');
dbms_output.put_line('Please scroll up to see details of all the sessions.');
dbms_output.put_line('=====================================================================');
close cur_c1;
exception
when no_data_found then
dbms_output.put_line('Unable to find process id &&uxproc!!!');
dbms_output.put_line('=====================================================================');
return;
when others then
dbms_output.put_line(sqlerrm);
return;
END;
/
undef uxproc
set heading on
set verify on
set feedback on
set echo on
Now U can kill the inactive session using below query:
alter system kill session 'SID,Serial#';
before doing this you can send mail to user creating lock to logout his session so that Locks are released.
If any one confirms that this can be killed...using the above query you can do that.
UR's Key Run ;-) 
