‘壹’ oracle查询锁表与解锁情况提供解决方案
如果发生了锁等待，我们可能更想知道是谁锁了表而引起谁的等待
以下的语句可以查询到谁锁了表:
复制代码
代码如下:
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
以下的语句可以查询到谁在等待:
复制代码
代码如下:
SELECT
/*+
rule
*/
lpad('
',decode(l.xisn
,0,3,0))||l.oracle_username
User_name,
o.owner,o.object_name,o.object_type,s.sid,s.serial#
FROM
v$locked_object
l,dba_objects
o,v$session
s
WHERE
l.object_id=o.object_id
AND
l.session_id=s.sid
ORDER
BY
o.object_id,xisn
DESC
解锁命令:
复制代码
代码如下:
alter
system
kill
session
'sid,serial#'
1).
复制代码
代码如下:
select
LOCK_INFO.OWNER
||
'.'
||
LOCK_INFO.OBJ_NAME
as
"已锁物件名称",
--物件名称(已经被锁住)
LOCK_INFO.SUBOBJ_NAME
as
"已锁子物件名称",
--
子物件名称(已经被锁住)
SESS_INFO.MACHINE
as
"机器名称",
--
机器名称
LOCK_INFO.SESSION_ID
as
"会话ID",
--
会话SESSION_ID
SESS_INFO.SERIAL#
as
"会话SERIAL#",
--
会话SERIAL#
SESS_INFO.SPID
as
"OS系统的SPID",
--
OS系统的SPID
(SELECT
INSTANCE_NAME
FROM
V$INSTANCE)
"实例名SID",
--实例名SID
LOCK_INFO.ORA_USERNAME
as
"ORACLE用户",
--
ORACLE系统用户名称
LOCK_INFO.OS_USERNAME
as
"OS用户",
--
作业系统用户名称
LOCK_INFO.PROCESS
as
"进程编号",
--
进程编号
LOCK_INFO.OBJ_ID
as
"对象ID",
--
对象ID
LOCK_INFO.OBJ_TYPE
as
"对象类型",
--
对象类型
SESS_INFO.LOGON_TIME
as
"登录时间",
--
登录时间
SESS_INFO.PROGRAM
as
"程式名称",
--
程式名称
SESS_INFO.STATUS
as
"会话状态",
--
会话状态
SESS_INFO.LOCKWAIT
as
"等待锁",
--
等待锁
SESS_INFO.ACTION
as
"动作",
--
动作
SESS_INFO.CLIENT_INFO
as
"客户资讯"
--
客户资讯
from
(select
obj.OWNER
as
OWNER,
obj.OBJECT_NAME
as
OBJ_NAME,
obj.SUBOBJECT_NAME
as
SUBOBJ_NAME,
obj.OBJECT_ID
as
OBJ_ID,
obj.OBJECT_TYPE
as
OBJ_TYPE,
lock_obj.SESSION_ID
as
SESSION_ID,
lock_obj.ORACLE_USERNAME
as
ORA_USERNAME,
lock_obj.OS_USER_NAME
as
OS_USERNAME,
lock_obj.PROCESS
as
PROCESS
from
(select
*
from
all_objects
where
object_id
in
(select
object_id
from
v$locked_object))
obj,
v$locked_object
lock_obj
where
obj.object_id
=
lock_obj.object_id)
LOCK_INFO,
(select
SID,
SERIAL#,
LOCKWAIT,
STATUS,
(select
spid
from
v$process
where
addr
=
a.paddr)
spid,
PROGRAM,
ACTION,
CLIENT_INFO,
LOGON_TIME,
MACHINE
from
v$session
a)
SESS_INFO
where
LOCK_INFO.SESSION_ID
=
SESS_INFO.SID
order
by
LOCK_INFO.SESSION_ID;
2).
复制代码
代码如下:
select
sql_text
from
v$sqltext
where
address
in
(select
sql_address
from
v$session
where
sid
=
&sid)
order
by
piece;
3).
复制代码
代码如下:
ALTER
SYSTEM
KILL
SESSION
'会话ID,会话SERIAL#';
4).
kill
-9
OS系统的SPID
‘贰’ oracle数据库表被锁了不能操作怎么办
首先你要知道表锁住了是不是正常锁？因为任何DML语句都会对表加锁。
你要先查一下是那个会话那个sql锁住了表，有可能这是正常业务需求，不建议随便KILL
session，如果这个锁表是正常业务你把session
kill掉了会影响业务的。
建议先查原因再做决定。
(1)锁表查询的代码有以下的形式：
select
count(*)
from
v$locked_object;
select
*
from
v$locked_object;
(2)查看哪个表被锁
select
b.owner,b.object_name,a.session_id,a.locked_mode
from
v$locked_object
a,dba_objects
b
where
b.object_id
=
a.object_id;
(3)查看是哪个session引起的
select
b.username,b.sid,b.serial#,logon_time
from
v$locked_object
a,v$session
b
where
a.session_id
=
b.sid
order
by
b.logon_time;
(4)查看是哪个sql引起的
select
b.username,b.sid,b.serial#,c.*
from
v$locked_object
a,v$session
b,v$sql
c
where
a.session_id
=
b.sid
and
b.SQL_ID
=
c.sql_id
and
c.sql_id
=
''
order
by
b.logon_time;
(5)杀掉对应进程
执行命令：alter
system
kill
session'1025,41';
其中1025为sid,41为serial#.
‘叁’ oracle 锁表、解锁的语句
1.正确方法用 select xxx from table for update; <- 锁表
直接用update table set xxx的话，只能锁row
不要commit的意思是不提交该transaction。若commit或rollback，则释放所有lock资源
2.commit = confirm 确认并提交该次会话中的修改
rollback = cancel 取消该次会话
‘肆’ sql数据库如何解锁呢
你先查一下你的数据表示不是锁表了。
select sess.sid,
sess.serial#,
lo.oracle_username,
lo.os_user_name,
ao.object_name,
lo.locked_mode
from v$locked_object lo,
dba_objects ao,
v$session sess
where ao.object_id = lo.object_id and lo.session_id = sess.sid
通过以上sql就可以知道哪个进程、序列，oracle用户名、操作系统用户名、表名、锁表模式几个字段
下面一步就是将改锁表的进程和序列杀掉了，执行下面的语句即可。
alter system kill session '1020,38953' --(1020，就是执行第一步语句得到的sid字段值，38953就是serial#字段值)
详细的请参照：网页链接
‘伍’ oracle锁表多长时间自动解锁
oracle锁表不会自动解锁。根据查询相关资料显示，oracle锁表想要解锁需要余带逗，找系统管理员，行败终止掉你竖卖之前的session，就可以了。会rollback回来。有管理者权限的话，通过客户端，一样可以做到的。
‘陆’ orcal数据库表被锁了怎么解锁
1、在做Oracle监听程序测试时，发现帐户已经被锁定。
‘柒’ ORACLE 如何查询被锁定表及如何解锁释放session
ORACLE
EBS操作某一个FORM界面，或者后台数据库操作某一个表时发现一直出于"假死"状态，可能是该表被某一用户锁定，导致其他用户无法继续操作
复制代码
代码如下:--锁表查询SQLSELECT
object_name,
machine,
s.sid,
s.serial#
FROM
gv$locked_object
l,
dba_objects
o,
gv$session
s
WHERE
l.object_id
=
o.object_id
AND
l.session_id
=
s.sid;
找到被锁定的表，解锁
复制代码
代码如下:--释放SESSION
SQL:
--alter
system
kill
session
'sid,
serial#';
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事务处理及表锁定深入简析
‘捌’ oracle查询资源占用，锁表解锁
1. 先通过top命令查看产用资厅正源较多的spid号
2.查询当前耗时的会话ID，扮雹悔用户名，sqlID等：
select sid,serial#,machine,username,program,sql_hash_value,sql_id,
to_char(logon_time,'yyyy/mm/dd hh24:mi:ss') as login_time from v$session
where paddr in (select addr from v$process where spid in ('5648612','256523'));
3. 如果上一步sql_id或者 hash_value不为空，则可用v$sqlarea查出当前正在使用的sql
select sql_text
from v$sqltext_with_newlines
where hash_value = &hash_value
order by piece;
也可直接使用:
select a.*,b.SQL_TEXT from (
select sid,serial#,machine,username,program,sql_hash_value,sql_id,
to_char(logon_time,'yyyy/mm/dd hh24:mi:ss') as login_time from v$session
where paddr in (select addr from v$process where spid in ('23226'))
) a,v$sql b
where a.sql_id = b.SQL_ID(+)
4.kill占用大资肆银源的session
Alter system kill session 'SID,SERIAL#'
解锁：
1.查询哪些对象被锁：
select object_name,machine,s.sid,s.serial#
from v$locked_object l,dba_objects o ,v$session s
where l.object_id=o.object_id and l.session_id=s.sid;
2.下面的语句用来杀死一个进程：
alter system kill session '524,1095'; (其中24,111分别是上面查询出的sid,serial#)
3.再一次查询目前锁定的对象，若发现以上方法不能解除锁定的表，则用以下方法：
3.1 执行下面的语句获得进程（线程）号：
select spid, osuser, s.program
from v$session s,v$process p
where s.paddr=p.addr and s.sid=524 （524是上面的sid）
‘玖’ oracle 表被锁住 怎么解锁
一般先查询并找到被锁定的表，解锁代码如下:
--释放SESSION余缓SQL:
--altersystemkillsession'sid,serial#';
ALTERsystem信慎kill竖坦模session'23,1647';
‘拾’ 查询Oracle锁表语句以及解锁语句
查询锁表：SELECT l.session_id sid,
s.serial#,
迟蠢滑 l.locked_mode,
l.oracle_username,
l.os_user_name,
s.machine,
档码 s.terminal,
o.object_name,
s.logon_time FROM v$locked_object l,
all_objects o,
v$session 码腊 s WHERE l.object_id = o.object_id ANd l.session_id = s.sid ORDER BY sid,
s.serial#;
解锁：ALTER system KILL session 'sid,serial#';
查询锁住原因：SELECT b.sid oracleID,b.username 登录Oracle用户名,b.serial#,spid 操作系统ID,paddr,
sql_text 正在执行的SQL,b.machine 计算机名 FROM v$process a, v$session b, v$sqlarea c
WHERE a.addr = b.paddr AND b.sql_hash_value = c.hash_value and b.USERNAME='FKPHIS24';