Oracle表空間的事情狀況要經常查看，一般空閑比例過低的時候就應該考慮增大表看空間了。查看方法如下SQL:方法一：select dbf.tab

Oracle表空間的事情狀況要經常查看，，一般空閑比例過低的時候就應該考慮增大表看空間了。查看方法如下SQL:

方法一：

select dbf.tablespace_name,
dbf.totalspace "總量(M)",
dbf.totalblocks as 總塊數,
dfs.freespace "剩余總量(M)",
dfs.freeblocks "剩余塊數",
(dfs.freespace / dbf.totalspace) * 100 "空閑比例"
from (select t.tablespace_name,
sum(t.bytes) / 1024 / 1024 totalspace,
sum(t.blocks) totalblocks
from dba_data_files t
group by t.tablespace_name) dbf,
(select tt.tablespace_name,
sum(tt.bytes) / 1024 / 1024 freespace,
sum(tt.blocks) freeblocks
from dba_free_space tt
group by tt.tablespace_name) dfs
where trim(dbf.tablespace_name) = trim(dfs.tablespace_name)

方法二：

SELECT Total.name "Tablespace Name",
Free_space, (total_space-Free_space) Used_space, total_space
FROM
(select tablespace_name, sum(bytes/1024/1024) Free_Space
from sys.dba_free_space
group by tablespace_name
) Free,
(select b.name, sum(bytes/1024/1024) TOTAL_SPACE
from sys.v_$datafile a, sys.v_$tablespace B
where a.ts# = b.ts#
group by b.name
) Total
WHERE Free.Tablespace_name = Total.name

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