表空间情况

1.查看表空间大小及使用率

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  

 

 

2.查看表空间是否是自动扩展

 

select file_id,file_name,tablespace_name,autoextensible,increment_by from dba_data_files order by file_id desc;