"ORACLE 테이블스페이스"의 두 판 사이의 차이

6 TABLESPACE 생성[편집]

CREATE TABLESPACE [테이블 스페이스명] DATAFILE 'C:\경로\TEST.DBF'SIZE 10M ==> 여기까지 작성하면 기본적인 사항에 대해서만 생성된다. AUTOEXTEND ON NEXT 10M ==> (옵션)데이타 파일 용량초과시 자동증가설정 MAXSIZE 100M ==> (옵션)데이타파일 최대크기지정 EXTENT MANAGEMENT LOCAL ==> (옵션) UNIFORM SIZE 1M ==> (옵션)

CREATE TABLESPACE [테이블 스페이스명]
DATAFILE 'C:\경로\TEST.DBF'
SIZE 10M
DEFAULT STORAGE(
   INITIAL 80K  ==> 테이블 스페이스의 맨 첫번째 EXTENTS의 크기
   NEXT 80K  ==> 다음 EXTENTS의 크기
   MINNEXTENTS 1  ==> 생성할 EXTENTS의 최소값
   MAXNEXTENTS 121  ==> 생성할 EXTENTS의 최대값
   PCTINCREASE 80  ==> EXTENTS의 증가율,(DEFAULT값은 50%)
) ONLINE ;

7 TEMP TABLESPACE 생성[편집]

CREATE TEMPORARY TABLESPACE [테이블 스페이스명]
TEMPFILE 'C:\경로\TEST_TEMP.DBF'
SIZE 10M
EXTENT MANAGEMENT LOCAL
UNIFORM SIZE 512K
  ==> LOCALY MANAGED TABLESPACE NUIFORM SIZE만 생성가능하다.
      (주의)AUTOALLOCATE, EXTENT MANAGEMENT DICIONARY OPTION을 사용하면 ORA-25319 ERROR 발생한다.
  ==> RENAME 이 불가능하다.

===TEMP TABLESPACE를 DEFAULT TABLESPACE로 변경===

ALTER DATABASE DEFAULT TEMPORARY TABLESPACE [테이블 스페이스명]

8 UNDO TABLESPACE 생성[편집]

CREATE UNDO TABLESPACE [테이블 스페이스명] ==> 이부분만 다름. DATAFILE 'C:\경로\TEST_UNDO.DBF' SIZE 10M AUTOEXTEND ON NEXT 10M MAXSIZE 100M

 ==> UNDO_MANAGEMENT와 UNDO_TABLESPACE, UNDO_RETENTION PARAMETER를 제공
 ==> 지역적으로 관리되는 익스텐트만 사용가능
 ==> 시스템에 의해 관리되는 익스텐트 할당만 사용가능하다.
       (UNIFORMSIZE를 할당 할 수 없고 AUTOALLOCATE만 가능)

9 테이블스페이스 정보 확인[편집]

SELECT SUBSTRB(TABLESPACE_NAME, 1, 10) AS "테이블스페이스"
     ,  SUBSTRB(FILE_NAME, 1, 50) AS "파일명"
     ,  TO_CHAR(BLOCKS, '999,999,990') AS "블럭수"
     ,  TO_CHAR(BYTES, '99,999,999') AS "크기"
  FROM DBA_DATA_FILES ORDER BY TABLESPACE_NAME, FILE_NAME;

SELECT A.TABLESPACE_NAME AS "TABLESPACE"
     , A.INITIAL_EXTENT / 1024 AS "INIT(K)"
     , A.NEXT_EXTENT / 1024 AS "NEXT(K)"
     , A.MIN_EXTENTS AS "MIN"
     , A.MAX_EXTENTS AS "MAX"
     , A.PCT_INCREASE AS "PCT_INC(%)"
     , B.FILE_NAME AS "FILE_NAME"
     , B.BLOCKS * C.VALUE / 1024 / 1024 AS "SIZE(M)"
     , B.STATUS AS "STATUS"
  FROM DBA_TABLESPACES A
     ,  DBA_DATA_FILES B
     ,  V$PARAMETER C
 WHERE A.TABLESPACE_NAME = B.TABLESPACE_NAME AND C.NAME = 'db_block_size' ORDER BY 1, 2;

SELECT SUBSTRB(TABLESPACE_NAME, 1, 10) AS TABLESPACE
     , TO_CHAR(SUM(BYTES), '9,999,999,999,990') AS BYTES
     , TO_CHAR(SUM(BLOCKS), '9,999,999,990') AS BLOCKS
  FROM DBA_DATA_FILES GROUP BY TABLESPACE_NAME 
UNION ALL 
SELECT '총계', TO_CHAR(SUM(BYTES), '9,999,999,999,990') AS BYTES, TO_CHAR(SUM(BLOCKS), '9,999,999,990') AS BLOCKS 
  FROM DBA_DATA_FILES;

SELECT A.TABLESPACE_NAME AS "TABLESPACE"
     , A.INIT AS "INIT(K)"
     , A.NEXT AS "NEXT(K)"
     , A.MIN AS "MIN"
     , A.MAX AS "MAX"
     , A.PCT_INC AS "PCT_INC(%)"
     , TO_CHAR(B.TOTAL, '999,999,999,990') AS "총량(바이트)"
     , TO_CHAR(C.FREE, '999,999,999,990') AS "남은량(바이트)"
     , TO_CHAR(B.BLOCKS, '9,999,990') AS "총블럭"
     , TO_CHAR(D.BLOCKS, '9,999,990') AS "사용블럭"
     , TO_CHAR(100 * NVL(D.BLOCKS, 0) / B.BLOCKS, '999.99') AS "사용율%"
  FROM (SELECT TABLESPACE_NAME
                , INITIAL_EXTENT / 1024 AS INIT
                , NEXT_EXTENT / 1024 AS NEXT
                , MIN_EXTENTS AS MIN
                , MAX_EXTENTS AS MAX
                , PCT_INCREASE AS PCT_INC
           FROM      DBA_TABLESPACES) A
     , (SELECT    TABLESPACE_NAME, SUM(BYTES) AS TOTAL, SUM(BLOCKS) AS BLOCKS
           FROM      DBA_DATA_FILES
           GROUP BY  TABLESPACE_NAME) B
     , (SELECT    TABLESPACE_NAME, SUM(BYTES) AS FREE
           FROM      DBA_FREE_SPACE
           GROUP BY  TABLESPACE_NAME) C
     , (SELECT    TABLESPACE_NAME, SUM(BLOCKS) AS BLOCKS
           FROM      DBA_EXTENTS
           GROUP BY  TABLESPACE_NAME) D

 WHERE A.TABLESPACE_NAME = B.TABLESPACE_NAME(+) AND A.TABLESPACE_NAME = C.TABLESPACE_NAME(+) AND A.TABLESPACE_NAME = D.TABLESPACE_NAME(+) 
ORDER BY A.TABLESPACE_NAME;

SELECT TABLESPACE_NAME, TABLE_NAME 
  FROM USER_TABLES 
 WHERE TABLESPACE_NAME = UPPER('&테이블스페이스명') 
 ORDER BY TABLESPACE_NAME, TABLE_NAME;

SELECT X.TABLESPACE_NAME
     , TOTAL_SIZE / 1024 / 1024 TOTAL_SIZE
     , USED_SIZE / 1024 / 1024 USED_SIZE
     , (ROUND(USED_SIZE / TOTAL_SIZE, 2)) * 100 USED_RATIO
  FROM (SELECT TABLESPACE_NAME, SUM(BYTES) TOTAL_SIZE
           FROM      DBA_DATA_FILES
           GROUP BY  TABLESPACE_NAME) X
     , (SELECT    TABLESPACE_NAME, SUM(BYTES) USED_SIZE
           FROM      DBA_EXTENTS
           GROUP BY  TABLESPACE_NAME) Y
 WHERE X.TABLESPACE_NAME = Y.TABLESPACE_NAME(+) AND Y.USED_SIZE > .9 * X.TOTAL_SIZE;

SELECT DISTINCT E.SEGMENT_NAME, E.TABLESPACE_NAME, F.FILE_NAME
  FROM DBA_EXTENTS E
     , DBA_DATA_FILES F
 WHERE E.FILE_ID = F.FILE_ID 
   AND E.SEGMENT_TYPE = 'TABLE' 
   AND E.TABLESPACE_NAME NOT IN ('SYSTEM', 'TOOLS');

SELECT OWNER
     , TABLESPACE_NAME
     , SUM(DECODE(SEGMENT_TYPE, 'TABLE', 1, 0))
     , SUM(DECODE(SEGMENT_TYPE, 'INDEX', 1, 0))
  FROM DBA_SEGMENTS WHERE SEGMENT_TYPE IN ('TABLE', 'INDEX') GROUP BY OWNER, TABLESPACE_NAME;

SELECT SUBSTRB(A.FILE_NAME, 1, 40) AS FILE_NAME
     , A.FILE_ID
     , B.FREE_BYTES / 1024 AS FREE_BYTES
     , B.MAX_BYTES / 1024 AS MAX_BYTES
  FROM DBA_DATA_FILES A
     , (SELECT FILE_ID, SUM(BYTES) AS FREE_BYTES, MAX(BYTES) AS MAX_BYTES
          FROM DBA_FREE_SPACE
         GROUP BY  FILE_ID) B
 WHERE A.FILE_ID = B.FILE_ID 
   AND A.TABLESPACE_NAME = UPPER('&테이블스페이스명') 
 ORDER BY A.FILE_NAME;

SELECT TABLESPACE_NAME
     , OWNER
     , SEGMENT_NAME
     , SEGMENT_TYPE
     , EXTENTS
     , MAX_EXTENTS
  FROM SYS.DBA_SEGMENTS S 
 WHERE EXTENTS / MAX_EXTENTS > .8 AND MAX_EXTENTS > 0 
 ORDER BY TABLESPACE_NAME, OWNER, SEGMENT_NAME;

/*
    오라클에서 스토리지 구조는 아래와 같다.
    테이블 스페이스 -> 세그먼트 -> 익스텐트 -> 블록 -> OS 범위 -> 데이터 파일 -> 운영체제 블록     
    세그먼트의 이름,
    해당 세그먼트의 최대 익스텐트 개수,
    익스텐트 아이디
    해당 세그먼트의 최대 익스텐트 개수 - 최대 익스텐트 아이디     
    딕셔너리 관리 테이블스페이스로 생성한 것으로 조회를 한다.
*/ 

SELECT B.SEGMENT_NAME
     , B.MAX_EXTENTS
     , MAX(C.EXTENT_ID) AS EXTENT_ID
     , B.MAX_EXTENTS - MAX(C.EXTENT_ID) AS DIFF
  FROM USER_TABLESPACES A
     , USER_SEGMENTS B
     , USER_EXTENTS C
 WHERE A.EXTENT_MANAGEMENT = 'DICTIONARY' 
   AND B.TABLESPACE_NAME = A.TABLESPACE_NAME 
   AND C.SEGMENT_NAME = B.SEGMENT_NAME 
 GROUP BY B.SEGMENT_NAME, B.MAX_EXTENTS 
HAVING B.MAX_EXTENTS - MAX(C.EXTENT_ID) <= 50 
 ORDER BY B.MAX_EXTENTS - MAX(C.EXTENT_ID);

--: EXTENTS = 현재 할당된 EXTENT의 수 --: EXTENDS = 마지막 트랜잭션에 의해 할당된 EXTENT의 수

SELECT SUBSTRB(A.SEGMENT_NAME, 1, 10) AS SEGMENT_NAME
     , SUBSTRB(A.TABLESPACE_NAME, 1, 10) AS TABLESPACE_NAME
     , TO_CHAR(A.SEGMENT_ID, '99,999') AS SEG_ID
     , TO_CHAR(A.MAX_EXTENTS, '999,999') AS MAX_EXT
     , TO_CHAR(B.EXTENTS, '999,999') AS EXTENTS
     , TO_CHAR(B.EXTENDS, '999,999') AS EXTENDS
     , TO_CHAR((A.INITIAL_EXTENT + (B.EXTENTS - 1) * A.NEXT_EXTENT) / 1000000, '9,999.999') AS "ALLOC(MB)"
     , TO_CHAR(XACTS, '9,999') AS XACTS
  FROM DBA_ROLLBACK_SEGS A
     , V$ROLLSTAT B
 WHERE A.SEGMENT_ID = B.USN(+) ORDER BY 1;