oracle死锁的处理办法

         摘自：https://www.cnblogs.com/xuke/p/4053396.html

                    http://blog.itpub.net/30036720/viewspace-2121034/

oracle表被锁（delete或update一直处于执行状态）的处理办法。

 1 --首先查看有哪些锁
 2 select /*+ rule */ s.username,
 3       decode(l.type,'TM','TABLE LOCK','TX','ROW LOCK',null) lock_level,
 4       o.owner,
 5       o.object_name,
 6       o.object_type,
 7       s.sid,s.serial#,
 8       s.terminal,
 9       s.machine,
10       s.program,
11       s.osuser
12 from v$session s,v$lock l,dba_objects o
13 where l.sid = s.sid
14 and l.id1 = o.object_id(+)
15 and s.username is not null
16  
17 --如果发生了锁等待，看是谁锁了表而引起谁的等待
18 --以下的语句可以查询到谁锁了表，而谁在等待。 如果有子节点，则表示有等待发生
19 select /*+ rule */ lpad(' ',decode(l.xidusn ,0,3,0))||l.oracle_username user_name,
20        o.owner,
21        o.object_name,
22        o.object_type,
23        s.sid,
24        s.serial#
25 from v$locked_object l,dba_objects o,v$session s
26 where l.object_id=o.object_id
27 and l.session_id=s.sid
28 order by o.object_id,xidusn desc
29  
30  
31 --找到引起等待的session,杀掉该session: 
32 alter system kill session 'sid,serial#';

ORACLE 锁表的解决方法及查找引起锁表SQL语句方法

 

分类： Oracle

2016-06-27 10:30:36

 


1. ORACLE中查看当前系统中锁表情况 
select * from v$locked_object 
可以通过查询v$locked_object拿到sid和objectid，然后用sid和v$session链表查询是哪里锁的表，用v$session中的objectid字段和dba_objects的id字段关联，查询详细的锁表情况。
查询SQL如下： 
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, v$process p 
where ao.object_id = lo.object_id 
   and lo.session_id = sess.sid;
查询是什么SQL引起了锁表的原因，SQL如下： 
select l.session_id sid, 
       s.serial#, 
       l.locked_mode, 
       l.oracle_username, 
       s.user#, 
       l.os_user_name, 
       s.machine, 
       s.terminal, 
       a.sql_text, 
       a.action 
  from v$sqlarea a, v$session s, v$locked_object l 
where l.session_id = s.sid 
   and s.prev_sql_addr = a.address 
order by sid, s.serial#;
2. ORACLE解锁的方法 
alter system kill session ’146′;  –146为锁住的进程号，即spid

转自 http://blog.itpub.net/196700/viewspace-754310/