ORACLE|오라클 락(Lock) 조회 및 해제

1) Lock 조회

select a.sid, a.serial#, a.username, a.process, b.object_name

  from v$session a, dba_objects b, v$lock c

where a.sid = c.sid

  and b.object_name = c.id1

  and c.type = 'TM'

2) Lock 해제

alter system kill session 'SID, SERIAL#'

-- 락걸린 테이블 확인

SELECT  do.object_name,  do.owner,  do.object_type,  do.owner,

  vo.xidusn,  vo.session_id,  vo.locked_mode

FROM 

  v$locked_object vo ,  dba_objects do

WHERE   vo.object_id = do.object_id ;

  

  

--해당테이블이 락에 걸렸는지..  

SELECT   A.SID,  A.SERIAL#,  B.TYPE,  C.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 IN ('테이블명');

    

 

/* 락발생 사용자와 sql, object 조회 */

SELECT   distinct x.session_id,  a.serial#,

  d.object_name,  a.machine,  a.terminal,

  a.program,  b.address,  b.piece,  b.sql_text

FROM  v$locked_object x,  v$session a,  v$sqltext b,  dba_objects d

WHERE  x.session_id = a.sid  and

  x.object_id = d.object_id  and

  a.sql_address = b.address  

order by b.address,b.piece;

 

/* 락 발생 사용자확인 */

SELECT   distinct x.session_id,  a.serial#,

  d.object_name,  a.machine,  a.terminal,  a.program,

  a.logon_time ,  'alter system kill session ''' || a.sid || ',  ' || a.serial# || ''';'

FROM   gv$locked_object x, gv$session a,  dba_objects d

WHERE   x.session_id = a.sid  and  x.object_id = d.object_id 

order by logon_time;  

/* 접속 사용자 제거 */

--alter system kill session 'session_id,serial#';

alter system kill session '26,6044'; 

/* 현재 접속자의 sql 분석 */

SELECT   distinct a.sid,  a.serial#,

  a.machine,  a.terminal,  a.program,

  b.address,  b.piece,  b.sql_text

FROM   v$session a,  v$sqltext b

WHERE   a.sql_address = b.address 

order by a.sid, a.serial#,b.address,b.piece;