JAESOO.COM (재수닷컴, 장재수) - [Oracle] Lock 확인 및 Lock 해제

Lock확인 및 Lock해제는 sys, system 계정으로 sqlplus 및 toad 접속하여 아래의 명령을 실행한다.

1. Lock 걸린 테이블 및 세션 확인

1) SID, 시리얼번호, 테이블명 확인

SELECT
    a.sid, a.serial#, a.username, a.process, b.object_name,
    DECODE(c.lmode,2,'RS',3,'RX',4,'S',5,'SRX',8,'X','NO') "TABLE LOCK",
    DECODE(a.command,2,'INSERT',3,'SELECT',6,'UPDATE',7,'DELETE',12,'DROP TABLE',26,'LOCK TABLE','UNknown') "SQL",
    DECODE(a.lockwait, NULL,'NO wait','Wait') "STATUS"
FROM
    v$session a, dba_objects b, v$lock c
WHERE
    a.sid=c.sid and b.object_id=c.id1
AND c.type='TM';

2) SID, 테이블명 확인

SELECT
    vo.session_id, do.object_name, do.owner, do.object_type,do.owner,
    vo.xidusn, vo.locked_mode
FROM
    v$locked_object vo , dba_objects do
WHERE
    vo.object_id = do.object_id;

3) 테이블명, Lock 상태 확인

SELECT
    T1.object_name,
    DECODE(locked_mode, 2, 'ROW SHARE', 3, 'ROW EXCLUSIVE', 4, 'SHARE', 5, 'SHARE ROW EXCLUSIVE', 6, 'EXCLUSIVE', 'UNKNOWN') lock_mode
FROM
    dba_objects T1, v$locked_object T2
WHERE
    T1.object_id = T2.object_id;

4) LOCK 상태와 세션 문자열 확인
(출력정렬 스크립트)

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
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
FROM
    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

2. Lock 걸린 테이블 세션 제거

usage) ALTER SYSTEM KILL SESSION 'session ID, 시리얼번호'

ex) ALTER SYSTEM KILL SESSION '189,26359'

3. PROCESS ID를 찾아내어 OS에서 제거
(Lock 걸린 테이블의 세션 제거가 안될 경우)

1) PID 검색

SELECT
    substr(s.username,1,11) "ORACLE USER", p.pid "PROCESS ID",
    s.sid "SESSION ID", s.serial#, osuser "OS USER",
    p.spid "PROC SPID",s.process "SESS SPID", s.lockwait "LOCK WAIT"
FROM
    v$process p, v$session s, v$access a
WHERE
    a.sid=s.sid
AND p.addr=s.paddr
AND s.username != 'SYS';

2) 리눅스에서 PID 제거
위 sql 검색결과에서 Lock걸린 v$session.process 번호를 아래의 pid에 넣으면 된다.

$kill -9 pid

[출처] [Oracle] Lock 확인 및 Lock 해제 |작성자 Real Iron

출처 : http://blog.naver.com/tchobd/30066708333