一条
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被锁
方法一
select * from v$locked_object //查看被锁的session
select * from v$session where sid=44 or sid=62 62 25120 找出sid,serial#号
alter system kill session '62,25120';
--这个增加了sql显示
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 , o.object_name
FROM v$sqlarea a,v$session s, v$locked_object l ,all_objects o
WHERE l.session_id = s.sid
AND s.prev_sql_addr = a.address and l.object_id = o.object_id ORDER BY sid, s.serial#;
方法二
1.下面的语句用来查询哪些对象被锁:
select distinct object_name,machine,s.sid,s.serial#
from v$locked_object l,dba_objects o ,v$session s
where l.object_id = o.object_id and l.session_id=s.sid;
2.下面的语句用来杀死一个进程:
alter system kill session '24,111'; (其中24,111分别是上面查询出的sid,serial#)
【注】以上两步,可以通过Oracle的管理控制台来执行。
3.如果利用上面的命令杀死一个进程后,进程状态被置为"killed",但是锁定的资源很长时间没有被释放,那么可以在os一级再杀死相应的进程(线程),首先执行下面的语句获得进程(线程)号:
select spid, osuser, s.program
from v$session s,v$process p
where s.paddr=p.addr and s.sid=24 (24是上面的sid)
4.在OS上杀死这个进程(线程):
1)在unix上,用root身份执行命令:
#kill -9 12345(即第3步查询出的spid)
2)在windows(unix也适用)用orakill杀死线程,orakill是oracle提供的一个可执行命令,语法为:
orakill sid thread
其中:
sid:
表
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示要杀死的进程属于的实例名
thread:是要杀掉的线程号,即第3步查询出的spid。
例:c:>orakill orcl 12345
过程被锁
查找所有被锁的过程名字
SELECT NAME FROM V$DB_OBJECT_CACHE WHERE OWNER='QIRUAN' AND LOCKS!='0'AND NAME='SPLITINFONEW_NEW';
获得过程的sid
SELECT SID FROM V$ACCESS WHERE OWNER='QIRUAN' AND OBJECT='SPLITINFONEW_NEW';
获得SERIAL# ,PADDR
SELECT SID,SERIAL#,PADDR FROM V$SESSION WHERE SID='462'; 合并后的sql
SELECT SID,SERIAL#,PADDR FROM V$SESSION WHERE SID= (SELECT SID FROM V$ACCESS WHERE OWNER='QIRUAN' AND
OBJECT='PRO_COM_SIMILARSTR_CALL');
杀掉会话
ALTER SYSTEM KILL SESSION '查出的SID,查出的SERIAL#'; 或者直接杀掉进程
SELECT SPID FROM V$PROCESS WHERE ADDR='刚才查到的PADDR'; KILL -9 刚才查出的SPID或ORAKILL 刚才查出的SID 刚才查出的SPID。
--1.查出锁定object的session的信息以及被锁定的object名
SELECT l.session_id sid, s.serial#, l.locked_mode,l.oracle_username,
l.os_user_name,s.machine, s.terminal, o.object_name, s.logon_time
FROM v$locked_object l, all_objects o, v$session s
WHERE l.object_id = o.object_id
AND l.session_id = s.sid
ORDER BY sid, s.serial# ;
--2.查出锁定表的session的sid, serial#,os_user_name, machine name, terminal和执行的语句
--比上面那段多出sql_text和action
SELECT l.session_id sid, s.serial#, l.locked_mode, l.oracle_username, s.user#,
l.os_user_name,s.machine, s.terminal,a.sql_text, a.action , o.object_name
FROM v$sqlarea a,v$session s, v$locked_object l ,all_objects o
WHERE l.session_id = s.sid
AND s.prev_sql_addr = a.address and l.object_id = o.object_id
ORDER BY sid, s.serial#;
--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;
查看进行中的数据库连接
select
s.SID,s.SERIAL# ,s.OSUSER,a.sql_text,s.PROGRAM,s.SQL_ID from v$session s,v$sqlarea a where s.username='HC365' AND s.STATUS='ACTIVE' and s.PREV_SQL_ADDR = a.address