Oracle 查询表空间使用情况

摘自博客：http://wwwdd2315.blog.163.com/blog/static/66661889201182711442660/

感谢！

通过查询dba_free_space表可以了解一个tablespace的空间使用情况。

TABLESPACE_NAME：
Name of the tablespace containing the extent
FILE_ID：
ID number of the file containing the extent
BLOCK_ID：
Starting block number of the extent
BYTES：
Size of the extent in bytes
BLOCKS：
Size of the extent in ORACLE block

1。查询表空间的free space

Sql代码

SQL> select

2 tablespace_name,

3 count(*) as extends,

4 round(sum(bytes)/1024/1024, 2) as MB,

5 sum(blocks) as blocks

6 from dba_free_space group by tablespace_name;

TABLESPACE EXTENDS MB BLOCKS

---------- ---------- ---------- ----------

UNDOTBS1 16 771.69 49388

SYSAUX 46 8.44 540

BLOBS 375 805.63 51560

USERS 645 67.69 4332

SYSTEM 1 4.75 304

INDX 1871 1071.56 68580

WCAUDIT 1 499.94 31996