Select count(*) from v$session where status='ACTIVE' #併發連接數
先查看哪些表被鎖住了
select b.owner,b.object_name,a.session_id,a.locked_mode
from v$locked_object a,dba_objects b
where b.object_id = a.object_id;
from v$locked_object a,v$session b
where a.session_id = b.sid order by b.logon_time;
alter system kill session 'sid,serial#';
1.查哪個過程被鎖
查V$DB_OBJECT_CACHE視圖:
SELECT * FROM V$DB_OBJECT_CACHE WHERE OWNER='過程的所屬用戶' AND CLOCKS!='0';
2. 查是哪一個SID,通過SID可知道是哪個SESSION.
查V$ACCESS視圖:
SELECT * FROM V$ACCESS WHERE OWNER='過程的所屬用戶' AND NAME='剛纔查到的過程名';
3. 查出SID和SERIAL#
查V$SESSION視圖:
SELECT SID,SERIAL#,PADDR FROM V$SESSION WHERE SID='剛纔查到的SID'
查V$PROCESS視圖:
SELECT SPID FROM V$PROCESS WHERE ADDR='剛纔查到的PADDR';
4. 殺進程
(1).先殺ORACLE進程:
ALTER SYSTEM KILL SESSION '查出的SID,查出的SERIAL#';
(2).再殺操作系統進程:
KILL -9 剛纔查出的SPID
或
ORAKILL 剛纔查出的SID 剛纔查出的SPID