ORACLE 락 정보
DB CAFE
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- DBA { Oracle DBA 명령어 > DBA 초급 과정 > DBA 고급 과정 }
- 튜닝 { 오라클 튜닝 목록 }
- 모델링 { 데이터 모델링 가이드 }
락 정보[편집]
-
- 22 테이블에 LOCK이 걸렸는지를 보기
SELECT A.SID
, A.SERIAL#
, SUBSTRB(A.USERNAME, 1, 16) AS USERNAME
, SUBSTRB(A.MACHINE, 1, 30) AS MACHINE
, A.TERMINAL
, A.OSUSER
, A.PROGRAM
, SUBSTRB(TO_CHAR(A.LOGON_TIME, 'MM/DD HH24:MI:SS'), 1, 14) AS LOGON_TIME
, SUBSTRB(C.OBJECT_NAME, 1, 58) AS OBJECT_NAME
FROM V$SESSION A
, V$LOCK B
, DBA_OBJECTS C
WHERE A.SID = B.SID AND B.ID1 = C.OBJECT_ID AND B.TYPE = 'TM' AND C.OBJECT_NAME LIKE UPPER('&테이블명');
-
- 23 Lock을 잡고있는 세션과 기다리는 세션 조회
SELECT DECODE(B.LOCKWAIT, NULL, ' ', 'w') AS WW
, B.SID
, B.SERIAL# AS SER#
, SUBSTR(B.MACHINE, 1, 10) AS MACHINE
, SUBSTR(B.PROGRAM, 1, 15) AS PROGRAM
, SUBSTR(A.OBJECT_NAME, 1, 17) AS OBJ_NAME
, SUBSTR(B.STATUS, 1, 1) AS S
, DECODE(B.COMMAND, 0, NULL, 2, 'INSERT', 6, 'UPDATE', 7, 'DELETE', B.COMMAND) AS SQLCMD
, B.PROCESS AS PGM_PSS
FROM V$SESSION B
, (SELECT A.SID, DECODE(B.OWNER, NULL, A.TYPE || '..ing', B.OWNER || '.' || B.OBJECT_NAME) AS OBJECT_NAME
FROM V$LOCK A
, DBA_OBJECTS B
WHERE A.ID1 = B.OBJECT_ID(+)
GROUP BY A.SID, DECODE(B.OWNER, NULL, A.TYPE || '..ing', B.OWNER || '.' || B.OBJECT_NAME)) A
WHERE B.SID = A.SID AND B.TADDR IS NOT NULL;
-
- 24 테이블에 걸린 비정상적 LOCK 풀기
ALTER SYSTEM KILL SESSION '&SID,&SERIAL';
-
- 25 작업 중인 데이터베이스 트랜잭션 조회
SELECT S.SID
, S.SERIAL#
, S.STATUS
, S.OSUSER
, S.USERNAME
, T.STATUS
, T.START_TIME
FROM V$SESSION S
, V$TRANSACTION T
, DBA_ROLLBACK_SEGS R
WHERE S.TADDR = T.ADDR AND T.XIDUSN = R.SEGMENT_ID;
-
- 26 열려 있는 커서 조회
SELECT A.SID
, A.OSUSER
, COUNT(B.SID) AS "CURSOR"
, A.PROGRAM
, A.STATUS
FROM V$SESSION A
, V$OPEN_CURSOR B
WHERE A.SID = B.SID(+) GROUP BY A.SID, A.OSUSER, A.PROGRAM, A.STATUS;
-
- 27 잠금 발생 유형 조회
SELECT A.SID
, DECODE(A.TYPE
, 'MR', 'MEDIA RECOVERY'
, 'RT', 'REDO THREAD'
, 'UN', 'USER_NAME'
, 'TX', 'TRANSACTION'
, 'TM', 'DML'
, 'UL', 'PL/SQL USER LOCK'
, 'DX', 'DISTRIBUTED XACTION'
, 'CF', 'CONTROL FILE'
, 'IS', 'INSTANCE STATE'
, 'FS', 'FILE SET'
, 'IR', 'INSTANCE RECOVERY'
, 'FS', 'FILE SET'
, 'ST', 'DISK SPACE TRANSACTION'
, 'TS', 'TEMP SEGMENT'
, 'IV', 'LIBRARY CACHE INVAILDATION'
, 'LS', 'LOG START OR SWITCH'
, 'RW', 'ROW WAIT'
, 'SQ', 'SEQUENCE NUMBER'
, 'TE', 'EXTEND TABLE'
, 'TT', 'TEMP TABLE'
, A.TYPE
)
AS "LOCK_TYPE"
, DECODE(A.LMODE
, 0, 'NONE'
, 1, 'NULL'
, 2, 'ROW-S(SS)'
, 3, 'ROW-X(SX)'
, 4, 'SHARE'
, 5, 'S/ROW-X(SSX)'
, 6, 'EXCLUSIVE'
, TO_CHAR(A.LMODE)
)
AS "MODE_HELD"
, DECODE(A.REQUEST
, 0, 'NONE'
, 1, 'NULL'
, 2, 'ROW-S(SS)'
, 3, 'ROW-X(SX)'
, 4, 'SHARE'
, 5, 'S/ROW-X(SSX)'
, 6, 'EXCLUSIVE'
, TO_CHAR(A.REQUEST)
)
AS "MODE_REQUESTED"
, TO_CHAR(A.ID1) AS "LOCK_ID1"
, TO_CHAR(A.ID2) AS "LOCK_ID2"
, DECODE(BLOCK, 0, 'NOT BLOCKING', 1, 'BLOCKING', 2, 'GLOBAL', TO_CHAR(BLOCK)) AS "BLOCKING_OTHERS"
FROM V$LOCK A WHERE (ID1, ID2) IN (SELECT B.ID1, ID2
FROM V$LOCK B
WHERE B.ID1 = A.ID1);
-
- 28 잠금 상태 오브젝트 조회
SELECT A.SESSION_ID
, B.SERIAL#
, A.OS_USER_NAME
, A.ORACLE_USERNAME
, C.OBJECT_NAME
, A.LOCKED_MODE
, A.XIDUSN
FROM V$LOCKED_OBJECT A
, V$SESSION B
, DBA_OBJECTS C
WHERE A.OBJECT_ID = C.OBJECT_ID AND A.SESSION_ID = B.SID;
-
- 29 잠금 SQL 구문 조회
SELECT B.USERNAME AS USERNAME
, C.SID AS SID
, C.OWNER AS OBJECT_OWNER
, C.OBJECT AS OBJECT
, B.LOCKWAIT
, A.PIECE
, A.SQL_TEXT AS SQL
FROM V$SQLTEXT A
, V$SESSION B
, V$ACCESS C
WHERE A.ADDRESS = B.SQL_ADDRESS AND A.HASH_VALUE = B.SQL_HASH_VALUE AND B.SID = C.SID AND C.OWNER!= 'SYS';
-
- 30 해당 테이블의 세션을 제거하는 쿼리
/*
특정 테이블이 락을 발생하고 있으면 세션을 찾아서 중단시킨다.
*/
SELECT 'ALTER SYSTEM KILL SESSION '''|| S.SID||','||S.SERIAL# ||''';' FROM V$LOCK L, DBA_OBJECTS O, V$SESSION S WHERE L.ID1 = O.OBJECT_ID AND S.SID = L.SID AND O.OWNER = 'ESTDBA' AND O.OBJECT_NAME = 'TMP_GSYM2'
#
##31 Blocking Lock Session 확인
<source lang='sql'> SELECT B.BLOCKING_SESSION AS BLOCKING_SESSION_SID
, C.SID AS LOCK_SESSION_SID
, C.OWNER AS OBJECT_OWNER
, C.OBJECT AS OBJECT
, B.LOCKWAIT
, A.PIECE
, A.SQL_TEXT AS SQL
FROM V$SQLTEXT A
, V$SESSION B
, V$ACCESS C
WHERE A.ADDRESS = B.SQL_ADDRESS AND A.HASH_VALUE = B.SQL_HASH_VALUE AND B.SID = C.SID AND B.BLOCKING_SESSION IS NOT NULL AND C.OWNER NOT IN ('SYS', 'PUBLIC') AND C.OBJECT NOT IN ('TOAD_PLAN_TABLE') ORDER BY A.PIECE;