Oracel 锁的相关知识
1. 查看哪些session锁:?
SQL语句：select 'alter system kill session '''||sid||','||serial#||''';' from v$session where sid in (select sid from v$lock where block = 1);?
SQL> select 'alter system kill session '''||sid||','||serial#||''';' from v$session where sid in (select sid from v$lock where block = 1);?
'ALTERSYSTEMKILLSESSION'''||SID||','||SERIAL#||''';'?
--------------------------------------------?
alter system kill session '132,731';?
alter system kill session '275,15205';?
alter system kill session '308,206';?
alter system kill session '407,3510';?
2. 查看session锁.?
sql语句：select s.sid, q.sql_text from v$sqltext q, v$session s?
where q.address = s.sql_address?
and s.sid = &sid?
order by piece;?
SQL> select s.sid,q.sql_text from v$sqltext q, v$session s where q.address = s.sql_address and s.sid in (select sid from v$lock where block = 1) order by piece;?
??????? SID SQL_TEXT?
---------- ----------------------------?
?????? 77 UPDATE PROFILE_USER SET ID=1,COMPANY_ID=2,CUSTOMER_ID=3,NAMED???
?????? 77 _INSURED_ID=4,LOGIN=5,ROLE_ID=6,PASSWORD=7,EMAIL=8,TIME_ZON?
?????? 77 E=9 WHERE PROFILE_USER.ID=:34?
3 rows selected.?
3. kill锁的进程.?
SQL语句：alter system kill session '77,22198';?
SQL> alter system kill session '391,48398';?
System altered.?
4. 查看谁锁了谁。?
select s1.username || [email='@']'@'[/email] || s1.machine?
? || ' ( SID=' || s1.sid || ' )? is blocking '?
? || s2.username || [email='@']'@'[/email] || s2.machine || ' ( SID=' || s2.sid || ' ) ' AS blocking_status?
? from v$lock l1, v$session s1, v$lock l2, v$session s2?
? where s1.sid=l1.sid and s2.sid=l2.sid?
? and l1.BLOCK=1 and l2.request > 0?
? and l1.id1 = l2.id1?
? and l2.id2 = l2.id2 ;?
