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运维DBA咨询想要查看Oracle的object对象的使用空间大小，包括表空间 表 索引 数据文件的使用空间

1、查看Oracle表空间大小

Select Tablespace_Name,Sum(bytes)/1024/1024 From Dba_Segments Group By Tablespace_Name order by Sum(bytes)/1024/1024 desc;

2、查看Oracle表占用空间

select segment_name, sum(bytes)/1024/1024 Mbytese from user_segments where segment_type='TABLE' group by segment_name order by segment_name;

Select Segment_Name,Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name order by Sum(bytes)/1024/1024 desc;

3、查看Oracle索引占用空间

select segment_name, sum(bytes)/1024/1024 Mbytese from user_segments where segment_type='INDEX' group by segment_name order by segment_name;

4、查看Oracle数据文件使用情况

select a.tablespace_name,

round(a.bytes / 1024 / 1024, 0)"总空间",

round((decode(b.bytes, null, 0, b.bytes)) / 1024 / 1024, 0)"使用空间",

round((decode(b.bytes, null, 0, b.bytes)) / a.bytes * 100, 1)"使用率",

c.file_name,

c.status

from sys.sm$ts_avail a, sys.sm$ts_free b, dba_data_files c

where a.tablespace_name = b.tablespace_name(+)

and a.tablespace_name = c.tablespace_name

order by a.tablespace_name;

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

select b.file_id 文件ID,

b.tablespace_name 表空间,

b.file_name 物理文件名,

b.bytes / 1024 / 1024 大小M,

c.max_extents / 1024 / 1024 可扩展数M,

b.bytes / 1024 / 1024 + c.max_extents / 1024 / 1024 总大小M,

trunc((b.bytes - sum(nvl(a.bytes, 0))) / 1024 / 1024) 　已使用M,

trunc(sum(nvl(a.bytes, 0)) / 1024 / 1024) 　剩余M,

trunc(sum(nvl(a.bytes, 0)) / (b.bytes) * 100, 2) 　剩余比

from dba_free_space a, dba_data_files b, dba_tablespaces c

where a.file_id = b.file_id

and b.tablespace_name = c.tablespace_name

group by b.tablespace_name,

b.file_name,

b.file_id,

b.bytes,

c.max_extents,

b.bytes / 1024 / 1024 + c.max_extents / 1024 / 1024

order by b.file_id;

5、查看Oracle表空间使用统计

select a.tablespace_name,

a.bytes / 1024 / 1024 "Sum MB",

(a.bytes - b.bytes) / 1024 / 1024 "used MB",

b.bytes / 1024 / 1024 "free MB",

round(((a.bytes - b.bytes) / a.bytes) * 100, 2) "percent_used"

from (select tablespace_name, sum(bytes) bytes

from dba_data_files

group by tablespace_name) a,

(select tablespace_name, sum(bytes) bytes, max(bytes) largest

from dba_free_space

group by tablespace_name) b

where a.tablespace_name = b.tablespace_name

order by ((a.bytes - b.bytes) / a.bytes) desc;

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最权威、专业的Oracle案例资源汇总之学习笔记:Oracle查看object对象 表空间 表 索引 数据文件的使用空间