ORACLE查找并解除死锁进程

  ORACLE查找并解除死锁进程

1、查找死锁进程

select /*+RULE*/v$lock.sid,
decode(v$lock.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 Invalida-tion',
        'LS', 'Log Start or Switch',
        'RW', 'Row Wait',
        'SQ', 'Sequence Number',
        'TE', 'Extend Table',
        'TT', 'Temp Table',
        'Unknown') LockType,
rtrim(object_type) || ' ' || rtrim(owner) || '.' || object_name object_name,
decode(lmode,   0, 'None',
                1, 'Null',
                2, 'Row-S',
                3, 'Row-X',
                4, 'Share',
                5, 'S/Row-X',
                6, 'Exclusive',        'Unknown') LockMode,
decode(request, 0, 'None',
                1, 'Null',
                2, 'Row-S',
                3, 'Row-X',
                4, 'Share',
                5, 'S/Row-X',
                6, 'Exclusive', 'Unknown') RequestMode,
ctime, block b
from v$lock, all_objects
where sid > 8
and v$lock.id1 = all_objects.object_id

如果查询结果有记录表明有锁

2、这个SQL可用来生成杀死死锁进程的SQL

select /*+RULE*/
 'alter system kill session ''' || a.sid || ',' || b.serial# || ''';'
 from v$lock a, all_objects c, v$session b
 where a.sid > 8
   and a.id1 = c.object_id
   and a.sid = b.sid;
或
select /*+RULE*/
 'alter system kill session ''' || a.sid || ',' || b.serial# || ''';'
 from v$lock a, v$session b
 where a.sid > 8
   and a.sid = b.sid;

3、把第二步的查询结果导出为脚本，在SQLPLUS中执行该脚本即可解除死锁。