SELECT bs.username
"Blocking User", bs.username "DB User",
ws.username "Waiting
User", bs.SID "SID", ws.SID "WSID",
bs.serial# "Serial#",
bs.sql_address "address",
bs.sql_hash_value "Sql hash",
bs.program "Blocking App",
ws.program "Waiting App",
bs.machine "Blocking Machine",
ws.machine "Waiting Machine",
bs.osuser "Blocking OS User",
ws.osuser "Waiting OS User",
bs.serial# "Serial#",
ws.serial# "WSerial#",
DECODE (wk.TYPE,
'MR', 'Media Recovery',
'RT', 'Redo Thread',
'UN', 'USER Name',
'TX', 'Transaction',
'TM', 'DML',
'UL', 'PL/SQL USER LOCK',
'DX', 'Distributed
Xaction',
'CF', 'Control FILE',
'IS', 'Instance State',
'FS', 'FILE SET',
'IR', 'Instance Recovery',
'ST', 'Disk SPACE
Transaction',
'TS', 'Temp Segment',
'IV', 'Library Cache Invalidation',
'LS', 'LOG
START OR Switch',
'RW', 'ROW Wait',
'SQ', 'Sequence Number',
'TE', 'Extend TABLE',
'TT', 'Temp TABLE',
wk.TYPE ) lock_type,
DECODE (hk.lmode,
0, 'None',
1,
'NULL',
2, 'ROW-S (SS)',
3,
'ROW-X (SX)',
4, 'SHARE',
5,
'S/ROW-X (SSX)',
6, 'EXCLUSIVE',
TO_CHAR (hk.lmode)
) mode_held,
DECODE
(wk.request,
0, 'None',
1,
'NULL',
2, 'ROW-S (SS)',
3,
'ROW-X (SX)',
4, 'SHARE',
5,
'S/ROW-X (SSX)',
6, 'EXCLUSIVE',
TO_CHAR (wk.request)
) mode_requested,
TO_CHAR (hk.id1) lock_id1, TO_CHAR (hk.id2) lock_id2,
DECODE
(hk.BLOCK,
0, 'NOT Blocking', /**//* Not
blocking any other processes */
1,
'Blocking', /**//* This lock blocks other processes */
2, 'Global', /**//* This lock is global, so we can't tell */
TO_CHAR (hk.BLOCK)
) blocking_others
FROM v$lock
hk, v$session bs, v$lock wk, v$session ws
WHERE hk.BLOCK = 1
AND hk.lmode != 0
AND hk.lmode != 1
AND wk.request != 0
AND wk.TYPE(+) = hk.TYPE
AND wk.id1(+) = hk.id1
AND
wk.id2(+) = hk.id2
AND hk.SID = bs.SID(+)
AND wk.SID =
ws.SID(+)
AND (bs.username IS NOT NULL)
AND (bs.username
<> 'SYSTEM')
AND (bs.username <> 'SYS')
ORDER
BY 1;
簡化版本的：
SELECT SID, DECODE (BLOCK, 0, 'NO', 'YES') blocker,
DECODE (request, 0, 'NO', 'YES') waiter
FROM v$lock
WHERE
request > 0 OR BLOCK > 0
ORDER BY BLOCK DESC;