查看表空间的使用情况:
SELECT UPPER(F.TABLESPACE_NAME) "表空间名",
D.TOT_GROOTTE_MB "表空间大小(M)",
D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",
TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) / D.TOT_GROOTTE_MB * 100,
2),
'990.99') "使用比",
F.TOTAL_BYTES "空闲空间(M)",
F.MAX_BYTES "最大块(M)"
FROM (SELECT TABLESPACE_NAME,
ROUND(SUM(BYTES) / (1024 * 1024), 2) TOTAL_BYTES,
ROUND(MAX(BYTES) / (1024 * 1024), 2) MAX_BYTES
FROM SYS.DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME) F,
(SELECT DD.TABLESPACE_NAME,
ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB
FROM SYS.DBA_DATA_FILES DD
GROUP BY DD.TABLESPACE_NAME) D
WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME
ORDER BY 4 DESC
查看表空间的文件构成情况:
select tablespace_name, file_id, file_name,
round(bytes/(1024*1024),0) total_space
from dba_data_files
order by tablespace_name;
表空间的使用情况也可以用下列简洁SQL语句:
SQL> select * from sm$ts_used;
TABLESPACE_NAME BYTES
------------------------------ ----------
DRSYS 10092544
EXAMPLE 152436736
ODM 9895936
SYSTEM 351338496
TOOLS 6291456
UNDOTBS1 2318336
XDB 46792704
7 rows selected.
SQL> select * from sm$ts_free;
TABLESPACE_NAME BYTES
------------------------------ ----------
DRSYS 10813440
EXAMPLE 196608
INDX 26148864
ODM 11010048
SYSTEM 5111808
TOOLS 4128768
UNDOTBS1 207290368
USERS 26148864
XDB 327680
to baizhaoxian:不错,sys用户的对象,谢谢。