oracle查看表空间和物理文件大小

时间:2024-03-09 08:10:00
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查看各表空间的使用情况

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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select * from dba_data_files
order by tablespace_name, file_name;

select tablespace_name,dba_tablespaces.* from dba_tablespaces

 

表真实占用的空间

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select OWNER, t.segment_name, t.segment_type,  
sum(t.bytes / 1024 / 1024/1024) USED_G
from dba_segments t
where t.owner LIKE \'%ODS%\'
AND SEGMENT_NAME NOT LIKE \'BIN$%\'
group by OWNER, t.segment_name, t.segment_type
order by OWNER, USED_G desc;

 

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--1、查看表空间的名称及大小   
select   t.tablespace_name,   round(sum(bytes/(1024*1024)),0)   ts_size   
from   dba_tablespaces   t,   dba_data_files   d   
where   t.tablespace_name   =   d.tablespace_name   
group   by   t.tablespace_name;   
--2、查看表空间物理文件的名称及大小   
select   tablespace_name,   file_id,   file_name,   
round(bytes/(1024*1024),0)   total_space   
from   dba_data_files   
order   by   tablespace_name;   
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alter tablespace {表空间名字} add datafile \'物理数据文件路径\' SIZE 『初始大小M』 AUTOEXTEND ON NEXT 『自动扩展大小M』

alter tablespace SDK_TB add datafile \'/oradata/ORA11G/sdk_tb2.dbf\' size 1000m autoextend on next 200m

 如果datafile加错到表空间,执行删除

Alter tablespace SDK_TB drop datafile \'/oradata/ORA11G/a_tb04.dbf\';
或者
alter database datafile \'/oradata/ORA11G/a_tb04.dbf\' offline drop;

 

查看临时表空间

select * from dba_temp_files
where tablespace_name = \'DEV_TEMP2\'
order by tablespace_name, file_name; 

添加临时表空间文件

alter tablespace  DEV_TEMP2 add tempfile \'/data/phonedb/datafile/dev_temp3.dbf\' size 1000m autoextend on next 200m

 

修改用户默认表空间

alter user user_name default tablespace dev_tb;
alter user user_name temporary tablespace  dev_temp;

查看数据文件是否有数据:

只需查看数据文件中是否包含extent段。如果有extent(索引段,数据段)段,则说明数据文件中有数据。
使用dba_extents视图和dba_data_files视图进行连接查询。

select t.file_name,t1.owner,t1.segment_name,t1.segment_type,t1.tablespace_name from dba_data_files t,dba_extents t1 where t.file_id=t1.file_id and file_name=\'你要查询的数据文件路径\';