如何查看oracle数据库死锁

1、?用SYS登陆TOAD

2、打开菜单Database-Monitor-SessionBrowser

3、查看所有会话，是否存在锁定资源的情况！

4、?如果有死锁，可以将此会话Kill掉！

-- 死锁查询语句

SELECTbs.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

查询发生死锁的select语句

select sql_text from v$sql where hash_value in (

select sql_hash_value from v$session where sid in (select session_id from v$locked_object)

)

用如下语句查询锁死的表：

select p.spid,

       a.serial#,

       c.object_name,

       b.session_id,

       b.oracle_username,

       b.os_user_name

  from v$process p, v$session a, v$locked_object b, all_objects c

 where p.addr = a.paddr

   and a.process = b.process

   and c.object_id = b.object_id

其中object_name就是被锁的表名，如图：

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