ORACLE數據庫慢排除

1、查詢當前被鎖的進程、用戶、對象。

select sess.sid,

sess.serial#,

lo.oracle_username,

lo.os_user_name,

ao.object_name,

lo.locked_mode

from v$locked_object lo, dba_objects ao, v$session sess

where ao.object_id = lo.object_id and lo.session_id = sess.sid;

2、批量KILL進程

declare

v_minutes NUMBER:=1000;

v_Str VARCHAR2(100);

CURSOR C_users(v_minutes number) IS

SELECT s.username,

s.status, s.machine, 'alter system kill session '

||''''||s.sid||','||s.serial# ||'''' operates

FROM v$session s, v$process p

WHERE TYPE = 'USER'

AND p.addr = s.paddr

AND status != 'KILLED'

and exists

(select 1

from dba_ddl_locks a,

v$session b

where a.session_id=b.SID

and b.USERNAME NOT IN ('IFSAPP','AUTOS','THK') --

and b.sid = s.sid)

ORDER BY last_call_et desc;

BEGIN

FOR T_users IN C_users(v_minutes) LOOP

v_Str := T_USERS.OPERATES;

BEGIN

EXECUTE IMMEDIATE v_str;

EXCEPTION

WHEN OTHERS THEN

NULL;

END;

END LOOP;

END;

3、查詢用戶執行時間

select --l.*,o.owner object_owner, o.object_Name,mac.status,mac.osuser,mac.machine

trunc(l.ctime/60,0) mm,(l.ctime/60-trunc(l.ctime/60,0))*60 ss,

l.sid,mac.SERIAL# serial,l.type,mac.osuser,mac.machine,mac.USERNAME user_, o.object_Name,mac.status,

mac.logon_time,'kill -9 '||(select spid from v$process p, v$session s where p.addr=s.paddr and s.sid =mac.sid) spid

,mac.program --,mac.*,o.*

from (select l.* from v$lock l where l.type = 'TM') l,

sys.all_objects o, sys.v_$session mac

where l.id1 = o.object_id

and l.sid = mac.sid;

4、查詢耗時較長的進程

SELECT c.last_call_et, b.value ,c.PROGRAM,c.MACHINE , c.status, c.*,

c.SERIAL#,c.SCHEMANAME,c.TERMINAL

FROM v$statname a,v$sesstat b, v$session c

WHERE a.STATISTIC# =b.STATISTIC#

AND b.sid =c.sid

AND a.name ='CPU used by this session'

AND Value > 100000

ORDER BY Value DESC;

SELECT c.last_call_et, b.value ,c.PROGRAM,c.MACHINE , c.status, c.*,

c.SERIAL#,c.SCHEMANAME,c.TERMINAL

FROM v$statname a,v$sesstat b, v$session c

WHERE a.STATISTIC# =b.STATISTIC#

AND b.sid =c.sid

AND a.name ='consistent gets'

AND Value > 100000000

ORDER BY Value DESC