Oracle检查死锁的sql（转）

最新推荐文章于 2024-10-12 07:46:51 发布

转载最新推荐文章于 2024-10-12 07:46:51 发布 · 1.9k 阅读

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#sql #oracle #user #session #null #table

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本文提供两种SQL查询方法来检测Oracle数据库中的死锁情况。通过这些查询可以找出导致死锁的进程及其相关信息，如用户名、应用程序名及锁定类型等。

检查死锁的sql语句

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;

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;