---1.查询表空间使用情况
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;
--2.查询数据文件信息
select * from Dba_Data_Files a where a.TABLESPACE_NAME='USERS';
--3.增加数据文件或者增大文件
ALTER tablespace *** add DATAFILE '**.dbf' size 5120m autoextend on next 500m maxsize 32767m;
alter database datafile '***' resize 1500m;

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oracle表空间使用情况监控并增加空间

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