Tablespace Management:
initialization parameters DB_CREATE_FILE_DEST,
DB_CREATE_ONLINE_LOG_DEST_n, or
DB_RECOVERY_FILE_DEST in your initialization parameter file, you instruct Oracle Database to create and manage the underlying operating system files of your database. Oracle Database will automatically create and manage the operating system files.
SHAIKDB>show parameter db_create_file
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_create_file_dest string
SHAIKDB>show parameter pfile
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
spfile string /u01/app/oracle/product/11.2.0.2/SHAIKPROD/dbs/spfileMYDB.ora
Set Datafile destination:
SHAIKDB>alter system set db_create_file_dest='/u01/app/oracle/mydb';
System altered.
SHAIKDB>show parameter create_file_dest
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_create_file_dest string /u01/app/oracle/mydb
col name for a40
select ts.name,df.name,bigfile from v$tablespace ts,v$datafile df where ts.ts#=df.ts#;
TSNAME DFNAME BIG
---------- -------------------------------------------------- ---
SYSTEM /u01/app/oracle/mydb/sys01.dbf NO
SYSAUX /u01/app/oracle/mydb/sysaux01.db NO
UNDOTBS1 /u01/app/oracle/mydb/undo1.dbf NO
USERS /u01/app/oracle/mydb/users01.dbf NO
f
Create tablespace and add datafiles:
SHAIKDB>create tablespace tbs1;
Tablespace created.
TSNAME DFNAME BIG
---------- -------------------------------------------------- ---
SYSTEM /u01/app/oracle/mydb/sys01.dbf NO
SYSAUX /u01/app/oracle/mydb/sysaux01.db NO
UNDOTBS1 /u01/app/oracle/mydb/undo1.dbf NO
USERS /u01/app/oracle/mydb/users01.dbf NO
TBS1 /u01/app/oracle/mydb/MYDB/datafile/o1_mf_tbs1_byp5 NO
bpjk_.dbf
SHAIKDB>alter tablespace TBS1 add datafile size 100m,size 10m autoextend on maxsize unlimited;
Tablespace altered.
SHAIKDB>select ts.name TSNAME,df.name DFNAME,bigfile from v$tablespace ts,v$datafile df where ts.ts#=df.ts#;
TSNAME DFNAME BIG
---------- ------------------------------------------------------------ ---
SYSTEM /u01/app/oracle/mydb/sys01.dbf NO
SYSAUX /u01/app/oracle/mydb/sysaux01.db NO
UNDOTBS1 /u01/app/oracle/mydb/undo1.dbf NO
USERS /u01/app/oracle/mydb/users01.dbf NO
TBS1 /u01/app/oracle/mydb/MYDB/datafile/o1_mf_tbs1_byp5bpjk_.dbf NO
TBS1 /u01/app/oracle/mydb/MYDB/datafile/o1_mf_tbs1_byp5p042_.dbf NO
TBS1 /u01/app/oracle/mydb/MYDB/datafile/o1_mf_tbs1_byp5p08f_.dbf NO
7 rows selected.
Create BIGFILE Tablespace:
SHAIKDB>drop tablespace tbs1 including contents and datafiles;
Tablespace dropped.
SHAIKDB>create bigfile tablespace BIGTBS;
Tablespace created.
SHAIKDB>select ts.name TSNAME,df.name DFNAME,bigfile from v$tablespace ts,v$datafile df where ts.ts#=df.ts#;
TSNAME DFNAME BIG
---------- ------------------------------------------------------------ ---
SYSTEM /u01/app/oracle/mydb/sys01.dbf NO
SYSAUX /u01/app/oracle/mydb/sysaux01.db NO
UNDOTBS1 /u01/app/oracle/mydb/undo1.dbf NO
USERS /u01/app/oracle/mydb/users01.dbf NO
BIGTBS /u01/app/oracle/mydb/MYDB/datafile/o1_mf_bigtbs_byp5v9f1_.db YES
f
Rename a datafile:
SHAIKDB>alter database datafile '/u01/app/oracle/mydb/MYDB/datafile/o1_mf_bigtbs_byp5v9f1_.dbf' offline;
alter database datafile '/u01/app/oracle/mydb/MYDB/datafile/o1_mf_bigtbs_byp5v9f1_.dbf' offline
*
ERROR at line 1:
ORA-01145: offline immediate disallowed unless media recovery enabled
SHAIKDB>archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 5
Current log sequence 7
SHAIKDB>alter tablespace bigtbs offline;
Tablespace altered.
SHAIKDB>!mv /u01/app/oracle/mydb/MYDB/datafile/o1_mf_bigtbs_byp5v9f1_.dbf /u01/app/oracle/mydb/MYDB/datafile/bigtbs.dbf
SHAIKDB>alter database rename file '/u01/app/oracle/mydb/MYDB/datafile/o1_mf_bigtbs_byp5v9f1_.dbf' to '/u01/app/oracle/mydb/MYDB/datafile/bigtbs.dbf';
Database altered.
SHAIKDB>alter tablespace bigtbs online;
Tablespace altered.
SHAIKDB>select ts.name TSNAME,df.name DFNAME,bigfile from v$tablespace ts,v$datafile df where ts.ts#=df.ts#;
TSNAME DFNAME BIG
---------- ------------------------------------------------------------ ---
SYSTEM /u01/app/oracle/mydb/sys01.dbf NO
SYSAUX /u01/app/oracle/mydb/sysaux01.db NO
UNDOTBS1 /u01/app/oracle/mydb/undo1.dbf NO
USERS /u01/app/oracle/mydb/users01.dbf NO
BIGTBS /u01/app/oracle/mydb/MYDB/datafile/bigtbs.dbf YES
Tablespace altered.
Useful views:
SHAIKDB>alter tablespace users nologging;
Tablespace altered.
SHAIKDB>alter tablespace users force logging;
Tablespace altered.
SHAIKDB>alter tablespace undotbs1 retention noguarantee;
Tablespace altered.
SHAIKDB>alter tablespace undotbs1 retention guarantee;
Tablespace altered.
SHAIKDB>alter tablespace undotbs1 retention noguarantee;
Tablespace altered.
Useful views:
| V$TABLESPACE | Name and number of all tablespaces from the control file. |
| V$ENCRYPTED_TABLESPACES | Name and encryption algorithm of all encrypted tablespaces. |
| DBA_TABLESPACES, USER_TABLESPACES | Descriptions of all (or user accessible) tablespaces. |
| DBA_TABLESPACE_GROUPS | Displays the tablespace groups and the tablespaces that belong to them. |
| DBA_SEGMENTS, USER_SEGMENTS | Information about segments within all (or user accessible) tablespaces. |
| DBA_EXTENTS, USER_EXTENTS | Information about data extents within all (or user accessible) tablespaces. |
| DBA_FREE_SPACE, USER_FREE_SPACE | Information about free extents within all (or user accessible) tablespaces. |
| DBA_TEMP_FREE_SPACE | Displays the total allocated and free space in each temporary tablespace. |
| V$DATAFILE | Information about all data files, including tablespace number of owning tablespace. |
| V$TEMPFILE | Information about all temp files, including tablespace number of owning tablespace. |
| DBA_DATA_FILES | Shows files (data files) belonging to tablespaces. |
| DBA_TEMP_FILES | Shows files (temp files) belonging to temporary tablespaces. |
| V$TEMP_EXTENT_MAP | Information for all extents in all locally managed temporary tablespaces. |
| V$TEMP_EXTENT_POOL | For locally managed temporary tablespaces: the state of temporary space cached and used for by each instance. |
| V$TEMP_SPACE_HEADER | Shows space used/free for each temp file. |
| DBA_USERS | Default and temporary tablespaces for all users. |
| DBA_TS_QUOTAS | Lists tablespace quotas for all users. |
| V$SORT_SEGMENT | Information about every sort segment in a given instance. The view is only updated when the tablespace is of the TEMPORARY type. |
| V$TEMPSEG_USAGE | Describes temporary (sort) segment usage by user for temporary or permanent tablespaces. |