oracle 如何查看有沒有死鎖

--?死鎖查詢語句

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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;

查詢發(fā)生死鎖的select語句

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)

)

怎么查看oracle是否有死鎖

-- 死鎖查詢語句

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;

查詢發(fā)生死鎖的select語句

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)

)

oracle表在什么情況下會被鎖住

在對指定表做append操作，其他再做truncate時候，會產(chǎn)生鎖表，如下驗證步驟，

1、創(chuàng)建測試表，

create table test_lock(id number, value varchar2(200));

2、執(zhí)行append語句；并且不做提交，insert /*+append*/ into test_lock values(1,1);

3、再次執(zhí)行清表語句，truncate table test_lock;報鎖表錯誤，

4、查看鎖表語句，發(fā)現(xiàn)被鎖表，

select b.object_name, t.*

from v$locked_object t, user_objects b

where t.object_id = b.object_id