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_timeFROM v$locked_object l, all_objects o, v$session sWHERE l.object_id = o.object_idAND l.session_id = s.sidORDER BY sid, s.serial# ;
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actionSELECT 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.actionFROM v$sqlarea a,v$session s, v$locked_object lWHERE l.session_id = s.sidAND s.prev_sql_addr = a.addressORDER BY sid, s.serial#;
查出锁定表的sid, serial#,os_user_name, machine_name, terminal，锁的type,modeSELECT s.sid, s.serial#, s.username, s.schemaname, s.osuser, s.process, s.machine,s.terminal, s.logon_time, l.typeFROM v$session s, v$lock lWHERE s.sid = l.sidAND s.username IS NOT NULLORDER BY sid;ign:left;mso-layout-grid-align: none;text-autospace:none'>ORDER BY sid, s.serial#;
这个语句将查找到数据库中所有的DML语句产生的锁，还可以发现，任何DML语句其实产生了两个锁，一个是表锁，一个是行锁。SELECT /*+ rule */ s.username,decode(l.type,'TM','TABLE LOCK','TX','ROW LOCK',NULL) LOCK_LEVEL,o.owner,o.object_name,o.object_type,s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuserFROM v$session s,v$lock l,dba_objects oWHERE l.sid = s.sidAND l.id1 = o.object_id(+)AND s.username is NOT NULL
查询到谁锁了表，而谁在等待。SELECT /*+ rule */ lpad(' ',decode(l.xidusn ,0,3,0))||l.oracle_username User_name,o.owner,o.object_name,o.object_type,s.sid,s.serial#FROM v$locked_object l,dba_objects o,v$session sWHERE l.object_id=o.object_idAND l.session_id=s.sidORDER BY o.object_id,xidusn DESC
查询后台执行语句的‘sid’与‘SERIAL’select distinct 'alter system kill session ''' || s.sid || ',' ||s.SERIAL# || '''' || ';'FROM v$locked_object l, all_objects o, v$session sWHERE l.object_id = o.object_idAND l.session_id = s.sid
根据上图的语句可以在命令窗口进行批量杀进行--kill session语句alter system kill session'50,492';