列出对象锁（lock）信息及其被杀的会话（sid,serial#）信息

check_lock.sql脚本 列出对象锁（lock）信息及其被杀的会话（sid,serial#）信息set linesize 132 pagesize 66 break on Kill on username on terminal column Kill heading 'Kill String' format a13 column res heading 'Resource Type' format 999 column id1 format 9999990 column id2 format 9999990 column lmode heading 'Lock Held' format a20 column request heading 'Lock Requested' format a20 column serial# format 99999 column username  format a10  heading "Username" column terminal heading Term format a6 column tab format a35 heading "Table Name" column owner format a9 column Address format a18 column ctime heading "Seconds"select  nvl(S.USERNAME,'Internal') username,         nvl(S.TERMINAL,'None') terminal,         L.SID||','||S.SERIAL# Kill,         U1.NAME||'.'||substr(T1.NAME,1,20) tab,         decode(L.LMODE,1,'No Lock',                 2,'Row Share',                 3,'Row Exclusive',                 4,'Share',                 5,'Share Row Exclusive',                 6,'Exclusive',null) lmode,         decode(L.REQUEST,1,'No Lock',                 2,'Row Share',                 3,'Row Exclusive',                 4,'Share',                 5,'Share Row Exclusive',                 6,'Exclusive',null) request,        l.ctimefrom    V$LOCK L,          V$SESSION S,         SYS.USER$ U1,         SYS.OBJ$ T1 where   L.SID = S.SID  and     T1.OBJ# = decode(L.ID2,0,L.ID1,L.ID2)  and     U1.USER# = T1.OWNER# and     S.TYPE != 'BACKGROUND' order by 1,2,5 / 会话1：以scott用户登录创建一个表t1[root@Oel_10G ~]# su - oracle[oracle@Oel_10G ~]$ sqlplus scott/oracleSQL> create table t1 (i int);            Table created.SQL> insert into t1 values(1);1 row created.SQL> commit;Commit complete.在会话1中给t1加一个锁SQL> select * from  t1 for update;         I----------         1会话 2：在会话2中更新t1表的一行， 由于t1表中有Row Exclusive锁，此时会话2获取不到锁暂时为挂起状态[root@Oel_10G ~]# su - oracle[oracle@Oel_10G ~]$ sqlplus scott/oracleSQL> update t1 set i=3 where i=1;会话 3：在会话3中更新t1表的一行， 由于t1表中有Row Exclusive锁，此时会话3获取不到锁暂时为挂起状态[root@Oel_10G ~]# su - oracle[oracle@Oel_10G ~]$ sqlplus scott/oracleSQL> update   t1 set i=5 where i=1;会话 4：新开一个会话，以sys登陆，执行lock_check.sql查看相关对象锁信息[root@Oel_10G ~]# su - oracle[oracle@Oel_10G ~]$ sqlplus / as  sysdbaSQL>@check_lock.sqlUsername   Term   Kill String   Table Name                          Lock Held            Lock Requested          Seconds---------- ------ ------------- ----------------------------------- -------------------- -------------------- ----------SCOTT      pts/1  525,891       PUBLIC.V$SQLAREA_PLAN_HASH          Exclusive                                        108                                SCOTT.T1                            Row Exclusive                                    108SCOTT      pts/2  544,8727      SCOTT.T1                            Row Exclusive                                     72                                PUBLIC.V$SQLAREA_PLAN_HASH                               Exclusive                    72SCOTT      pts/3  522,5542      SCOTT.T1                            Row Exclusive                                      6                                PUBLIC.V$SQLAREA_PLAN_HASH                               Exclusive                     66 rows selected.执行脚本后，结果列出表t1相关对象及锁信息，会话1持有t1的行独占锁，会话2与会话3都在请求Exclusive锁现在我们kill掉scott用户下sid,serial#为（522,5542）的会话SQL> alter system kill session '522,5542';System altered在会话3中可以看到(sid,serial#)(522,5542)被杀掉SQL> update   t1 set i=5 where i=1;update   t1 set i=5 where i=1         *ERROR at line 1:ORA-00028: your session has been killed在会话4中继续执行check_lock.sqlSQL>@check_lock.sqlUsername   Term   Kill String   Table Name                          Lock Held            Lock Requested          Seconds---------- ------ ------------- ----------------------------------- -------------------- -------------------- ----------SCOTT      pts/1  525,891       PUBLIC.V$SQLAREA_PLAN_HASH          Exclusive                                        388                                SCOTT.T1                            Row Exclusive                                    388SCOTT      pts/2  544,8727      SCOTT.T1                            Row Exclusive                                    352                                PUBLIC.V$SQLAREA_PLAN_HASH                               Exclusive                   352此时，会话3已被***