oracle 表锁
2016-02-04 12:52
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1. 重要table及view表及其栏位介绍
select * from dba_objects
object_name,object_id
select * from v$session: 当前session
sid,serial#,machine,prev_sql_addr,username,status,osuser,program,
select * from v$locked_object: --当前锁
oracle_username,os_user_name,locked_mode,object_id = dba_objects.objects_id,session_id = v$session.sid
SELECT * FROM v$lock;
type(decode(l.type,'TM','TABLE LOCK','TX','ROW LOCK',NULL) ),sid=v$session.sid
SELECT * FROM v$sqlarea; --session对应的sql
address = v$session.prev_sql_addr, sql_text, action
SELECT * FROM v$session_wait;
2.查看锁表进程SQL语句1: 锁对应的信息
select sess.sid,
sess.serial#,
lo.oracle_username,
lo.os_user_name,
ao.object_name,
lo.locked_mode
from v$locked_object lo,
dba_objects ao,
v$session sess
where ao.object_id = lo.object_id and lo.session_id = sess.sid;
3.查看锁表进程SQL语句2: 锁对应的session
select * from v$session t1, v$locked_object t2 where t1.sid = t2.SESSION_ID;
4.查看锁表进程SQL语句3:session对应锁及object name等信息
SELECT /*+ rule */ s.username,
decode(l.type,'TM','TABLE LOCK',
'TX','ROW LOCK',
NULL) LOCK_LEVEL,
o.owner,o.object_name,o.object_type,
s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser
FROM v$session s,v$lock l,dba_objects o
WHERE l.sid = s.sid
AND l.id1 = o.object_id(+)
AND s.username is NOT Null;
5.杀掉锁表进程:
如有記錄則表示有lock,記錄下SID和serial# ,將記錄的ID替換下面的738,1429,即可解除LOCK
alter system kill session '738,1429';
PS,Oracle有自己的进程管理策略,很多情况下杀进程往往不能即使生效,可以加alter system kill ... immediately 试试
select * from dba_objects
object_name,object_id
select * from v$session: 当前session
sid,serial#,machine,prev_sql_addr,username,status,osuser,program,
select * from v$locked_object: --当前锁
oracle_username,os_user_name,locked_mode,object_id = dba_objects.objects_id,session_id = v$session.sid
SELECT * FROM v$lock;
type(decode(l.type,'TM','TABLE LOCK','TX','ROW LOCK',NULL) ),sid=v$session.sid
SELECT * FROM v$sqlarea; --session对应的sql
address = v$session.prev_sql_addr, sql_text, action
SELECT * FROM v$session_wait;
2.查看锁表进程SQL语句1: 锁对应的信息
select sess.sid,
sess.serial#,
lo.oracle_username,
lo.os_user_name,
ao.object_name,
lo.locked_mode
from v$locked_object lo,
dba_objects ao,
v$session sess
where ao.object_id = lo.object_id and lo.session_id = sess.sid;
3.查看锁表进程SQL语句2: 锁对应的session
select * from v$session t1, v$locked_object t2 where t1.sid = t2.SESSION_ID;
4.查看锁表进程SQL语句3:session对应锁及object name等信息
SELECT /*+ rule */ s.username,
decode(l.type,'TM','TABLE LOCK',
'TX','ROW LOCK',
NULL) LOCK_LEVEL,
o.owner,o.object_name,o.object_type,
s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser
FROM v$session s,v$lock l,dba_objects o
WHERE l.sid = s.sid
AND l.id1 = o.object_id(+)
AND s.username is NOT Null;
5.杀掉锁表进程:
如有記錄則表示有lock,記錄下SID和serial# ,將記錄的ID替換下面的738,1429,即可解除LOCK
alter system kill session '738,1429';
PS,Oracle有自己的进程管理策略,很多情况下杀进程往往不能即使生效,可以加alter system kill ... immediately 试试
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