1. 查看所有表空间大小
SQL> select tablespace_name,sum(bytes)/1024/1024from dba_data_files
2 group by tablespace_name;
2. 已经使用的表空间大小
SQL> select tablespace_name,sum(bytes)/1024/1024from dba_free_space
2 group by tablespace_name;
3. 所以使用空间可以这样计算
select a.tablespace_name,total,free,total-free usedfrom
( select tablespace_name,sum(bytes)/1024/1024 totalfrom dba_data_files
group bytablespace_name) a,
( select tablespace_name,sum(bytes)/1024/1024 freefrom dba_free_space
group bytablespace_name) b
where a.tablespace_name=b.tablespace_name;
4. 下面这条语句查看所有segment的大小。
Select Segment_Name,Sum(bytes)/1024/1024 FromUser_Extents Group By Segment_Name
5. 还有在命令行情况下如何将结果放到一个文件里。
SQL> spool out.txt
SQL> select * from v$database;
SQL> spool off
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 (SELECTTABLESPACE_NAME,
ROUND(SUM(BYTES) /(1024 * 1024), 2) TOTAL_BYTES,
ROUND(MAX(BYTES) /(1024 * 1024), 2) MAX_BYTES
FROMSYS.DBA_FREE_SPACE
GROUP BYTABLESPACE_NAME) F,
(SELECTDD.TABLESPACE_NAME,
ROUND(SUM(DD.BYTES) /(1024 * 1024), 2) TOT_GROOTTE_MB
FROM SYS.DBA_DATA_FILESDD
GROUP BYDD.TABLESPACE_NAME) D
WHERED.TABLESPACE_NAME = F.TABLESPACE_NAME
ORDER BY 4 DESC
--查询表空间使用情况
SELECTUPPER(F.TABLESPACE_NAME) "表空间名",
D.TOT_GROOTTE_MB"表空间小(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 "最块(M)"
FROM (SELECTTABLESPACE_NAME,
ROUND(SUM(BYTES) /(1024 * 1024), 2) TOTAL_BYTES,
ROUND(MAX(BYTES) /(1024 * 1024), 2) MAX_BYTES
FROMSYS.DBA_FREE_SPACE
GROUP BYTABLESPACE_NAME) F,
(SELECTDD.TABLESPACE_NAME,
ROUND(SUM(DD.BYTES)/ (1024 * 1024), 2) TOT_GROOTTE_MB
FROMSYS.DBA_DATA_FILES DD
GROUP BYDD.TABLESPACE_NAME) D
WHERE D.TABLESPACE_NAME= F.TABLESPACE_NAME
ORDER BY 1
--查询表空间的free space
selecttablespace_name,
count(*) as extends,
round(sum(bytes) /1024 / 1024, 2) as MB,
sum(blocks) as blocks
from dba_free_space
group bytablespace_name;
--查询表空间的总容量
select tablespace_name,sum(bytes) / 1024 / 1024 as MB
from dba_data_files
group bytablespace_name;
--查询表空间使用率
selecttotal.tablespace_name,
round(total.MB, 2) asTotal_MB,
round(total.MB -free.MB, 2) as Used_MB,
round((1 - free.MB /total.MB) * 100, 2) || '%' as Used_Pct
from (selecttablespace_name, sum(bytes) / 1024 / 1024 as MB
from dba_free_space
group bytablespace_name) free,
(selecttablespace_name, sum(bytes) / 1024 / 1024 as MB
from dba_data_files
group bytablespace_name) total
wherefree.tablespace_name = total.tablespace_name;
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 (SELECTTABLESPACE_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,
(SELECTDD.TABLESPACE_NAME,
ROUND(SUM(DD.BYTES)/ (1024 * 1024), 2) TOT_GROOTTE_MB FROMSYS.DBA_DATA_FILES DD GROUP
BYDD.TABLESPACE_NAME) D WHERE D.TABLESPACE_NAME =F.TABLESPACE_NAME ORDER
BY 4 DESC