先用这条命令查询数据库阻塞的进程    SELECT * FROM information_schema.innodb_trx 
在杀死进程     kill 792506

1.查看数据库锁,诊断锁的来源及类型：
select object_id,session_id,locked_mode from v$locked_object;
或者用以下命令：
select b.owner,b.object_name,l.session_id,l.locked_mode
from v$locked_object l, dba_objects b
where b.object_id=l.object_id

SELECT lpad(' ',decode(l.xidusn ,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,xidusn DESC

2.找出数据库的serial#,以备杀死：
select t2.username,t2.sid,t2.serial#,t2.logon_time
from v$locked_object t1,v$session t2
where t1.session_id=t2.sid order by t2.logon_time;

3.杀死该session
alter system kill session 'sid,serial#'
用步骤2中查出来的记录，用该语句删除

 select session_id from v$locked_object; 
SELECT sid, serial#, username, osuser FROM v$session where sid = 113;
ALTER SYSTEM KILL SESSION '113,15226'; 

查询锁表语句和 pid：

select pid, query from pg_stat_activity where datname='数据库名' and wait_event_type = 'Lock';

可以看到那些执行 sql 语句的进程被锁了，卡住了。



select pg_cancel_backend( '进程pid');该语句可以把锁住的进程杀掉。
通过 sql 语句拼装可以方便的把所有进程号封装起来，进而进行批量解锁

select 'select pg_cancel_backend( '''|| pid ||''');' pid from pg_stat_activity where datname='auto_2012_oracle_yz1' and wait_event_type = 'Lock';



查询后的结果复制下来可以直接执行。
select pg_cancel_backend( '17275');
select pg_cancel_backend( '31138');
select pg_cancel_backend( '4167');
select pg_cancel_backend( '8426');
select pg_cancel_backend( '8427');
select pg_cancel_backend( '30100');
select pg_cancel_backend( '30102');
select pg_cancel_backend( '30104');
select pg_cancel_backend( '28862');
select pg_cancel_backend( '16557');

可以达到批量解锁表的功能。



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