Oracle10g ASM數據庫中表空間的維護
2024-08-29 13:37:15
供稿：網友
1.缺省的Oracle命名
當使用ASM + OMF治理時，Oracle會自動分配文件名稱，創建相應的文件。
我們創建表空間的工作可以簡化為:
create tablespace tablespace_name;
一個命令。
以下是Oracle的缺省命名示例:
$ sqlplus "/ as sysdba"
SQL*Plus: Release 10.1.0.3.0 - PRodUCtion on Thu Jun 16 09:26:22 2005
Copyright (c) 1982, 2004, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.1.0.3.0 - 64bit Production
With the Partitioning and Data Mining options
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
+DATADG/mmsdb/datafile/system.259.3
+DATADG/mmsdb/datafile/undotbs1.258.3
+DATADG/mmsdb/datafile/sysaux.257.3
+DATADG/mmsdb/datafile/users.256.3
+DATADG/mmsdb/datafile/platform.278.1
+DATADG/mmsdb/datafile/gateway.279.1
6 rows selected.
2.自定義名稱和文件大小創建
假如我們想自定義文件大小及名稱，可以使用如下方法創建:
SQL> create tablespace cumail datafile '+DATADG/mmsdb/datafile/cumail'size 100m;
Tablespace created.
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
+DATADG/mmsdb/datafile/system.259.3
+DATADG/mmsdb/datafile/undotbs1.258.3
+DATADG/mmsdb/datafile/sysaux.257.3
+DATADG/mmsdb/datafile/users.256.3
+DATADG/mmsdb/datafile/platform.278.1
+DATADG/mmsdb/datafile/gateway.279.1
+DATADG/mmsdb/datafile/cumail
7 rows selected.
SQL> drop tablespace cumail including contents and datafiles;
Tablespace dropped.
3.創建ASSM治理表空間
需要指定segment space子句:
SQL> create tablespace cumail
2 segment space management auto;
Tablespace created.
SQL> select name from v$datafile;
NAME
------------------------------------------------------
+DATADG/mmsdb/datafile/system.259.3
+DATADG/mmsdb/datafile/undotbs1.258.3
+DATADG/mmsdb/datafile/sysaux.257.3
+DATADG/mmsdb/datafile/users.256.3
+DATADG/mmsdb/datafile/platform.278.1
+DATADG/mmsdb/datafile/gateway.279.1
+DATADG/mmsdb/datafile/cumail.280.3
7 rows selected.
SQL> select tablespace_name,extent_management,segment_space_management from dba_tablespaces;
TABLESPACE_NAME EXTENT_MAN SEGMEN
------------------------------ ---------- ------
SYSTEM LOCAL MANUAL
UNDOTBS1 LOCAL MANUAL
SYSAUX LOCAL AUTO
TEMP LOCAL MANUAL
USERS LOCAL AUTO
PLATFORM LOCAL MANUAL
GATEWAY LOCAL MANUAL
CUMAIL LOCAL AUTO
8 rows selected.
4.更改文件大小
SQL> alter database datafile '+DATADG/mmsdb/datafile/cumail.280.3' resize 300m;
Database altered.
SQL>
5.設置UNIFORM SIZE屬性
假如需要設置extent的一些屬性，那么必須顯示的指定。
SQL> create tablespace ticket extent management local uniform size 128k segment space management auto;
Tablespace created.
SQL> select name ,bytes/1024/1024 from v$datafile;
NAME BYTES/1024/1024
---------------------------------------- ---------------
+DATADG/mmsdb/datafile/system.259.3 450
+DATADG/mmsdb/datafile/undotbs1.258.3 25
+DATADG/mmsdb/datafile/sysaux.257.3 330
+DATADG/mmsdb/datafile/users.256.3 5
+DATADG/mmsdb/datafile/platform.278.1 1000
+DATADG/mmsdb/datafile/gateway.279.1 1000
+DATADG/mmsdb/datafile/cumail.280.3 300
+DATADG/mmsdb/datafile/ticket.281.1 100
8 rows selected.
SQL> alter database datafile '+DATADG/mmsdb/datafile/ticket.281.1' resize 300m;
Database altered.
簡單操作，供參考。
