1 创建实验环境
1.1 创建ASSM的表空间
SQL> set serveroutput on
SQL> create tablespace ASSM datafile '/oradata/ltest/assm.dbf' size 10m autoextend on SEGMENT SPACE MANAGEMENT AUTO;
Tablespace created
SQL> select tablespace_name,
2 block_size,
3 extent_management,
4 allocation_type,
5 segment_space_management
6 from dba_tablespaces
7 where tablespace_name = 'ASSM';
TABLESPACE_NAME BLOCK_SIZE EXTENT_MANAGEMENT ALLOCATION_TYPE SEGMENT_SPACE_MANAGEMENT
--------------- ---------- ----------------- --------------- ------------------------
ASSM 8192 LOCAL SYSTEM AUTO
1.2 建表
SQL> create table my_objects tablespace assm as select * from all_objects;
Table created
SQL> select count(*) from my_objects;
COUNT(*)
----------
49903
2 实验前的信息
SQL> exec show_space('MY_OBJECTS');
Total Blocks ..........................768
Total Bytes ..........................6291456
Total MBytes ..........................6
Unused Blocks ..........................62
Unused Bytes ..........................507904
Unused KBytes ..........................496
Last Used Ext FileId....................7
Last Used Ext BlockId...................649
Last Used Block.........................66
The segment is analyzed below
FS1 Blocks (0-25) ....................0
FS2 Blocks (25-50) ....................0
FS3 Blocks (50-75) ....................0
FS4 Blocks (75-100) ....................0
Unformatted Blocks ....................0
Full Blocks ....................686
PL/SQL procedure successfully completed