如何检查表空间信息

[demiurge]

用select * from v#tabspace只能看到有几个表空间，请问如何看到表空间的总值，
已用值，剩余值等信息。

[jiezhi]

监控表空间的 I/O 比例
select df.tablespace_name name,df.file_name "file",f.phyrds pyr,
f.phyblkrd pbr,f.phywrts pyw, f.phyblkwrt pbw
from v$filestat f, dba_data_files df
where f.file# = df.file_id
order by df.tablespace_name;

List tablespace fragmentation information:

SELECT tablespace_name,COUNT(*) AS fragments,
SUM(bytes) AS total,
MAX(bytes) AS largest
FROM dba_free_space
GROUP BY tablespace_name;

[zhouyong110]

SQL> select
b.file_id 文件ID号,
b.tablespace_name 表空间名,
b.bytes 字节数,
(b.bytes-sum(nvl(a.bytes,0))) 已使用,
sum(nvl(a.bytes,0)) 剩余空间,
sum(nvl(a.bytes,0))/(b.bytes)*100 剩余百分比
from dba_free_space a,dba_data_files b
where a.file_id=b.file_id
group by b.tablespace_name,b.file_id,b.bytes
order by b.file_id