查看Oracle中是否有锁表

时间:2022-05-15 04:57:15

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查看Oracle中是否有锁表

2018-04-23 17:59 alapha 阅读(19450) 评论(0) 编辑 收藏

一、用dba用户登录,或者将用户赋权为DBA用户

命令:

su - oracle

sqlplus / nolog

conn sys as sysdba

sys

grant connect,resource,dba to TSAMS(用户名);

二、执行sql查看被锁的表、用户、session等信息。参考文章:http://www.cnblogs.com/XQiu/p/5212787.html

--以下几个为相关表
SELECT * FROM v$lock;
SELECT * FROM v$sqlarea;
SELECT * FROM v$session;
SELECT * FROM v$process ;
SELECT * FROM v$locked_object;
SELECT * FROM all_objects;
SELECT * FROM v$session_wait;

--查看被锁的表
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;

--查看那个用户那个进程照成死锁
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;

--查看连接的进程
SELECT sid, serial#, username, osuser FROM v$session;

--3.查出锁定表的sid, serial#,os_user_name, machine_name, terminal,锁的type,mode
SELECT s.sid, s.serial#, s.username, s.schemaname, s.osuser, s.process, s.machine,
s.terminal, s.logon_time, l.type
FROM v$session s, v$lock l
WHERE s.sid = l.sid
AND s.username IS NOT NULL
ORDER BY sid;

这个语句将查找到数据库中所有的DML语句产生的锁,还可以发现,
任何DML语句其实产生了两个锁,一个是表锁,一个是行锁。

--杀掉进程 sid,serial#
alter system kill session'210,11562';