select a.tablespace_name,a.bytes bytes_used,b.largest,round(((a.bytes - b.bytes)/a.bytes)*,) 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 查询所有表空间的总容量、已经使用、剩余、已经使用的百分比! select a.tablespace_name,a.bytes// "Sum MB",(a.bytes-b.bytes)// "used MB",b.bytes// "free MB",
round(((a.bytes-b.bytes)/a.bytes)*,) "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 一般来说可以把上面的复杂的查询语句放入一个文件中,需要时再调用,或者创建一个试图,需要时可以查询。
写入文件:#vi /home/mzl/percent_used_tablespace.sql
内容:
select a.tablespace_name,a.bytes// "Sum MB",(a.bytes-b.bytes)// "used MB",b.bytes// "free MB",
round(((a.bytes-b.bytes)/a.bytes)*,) "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 导入:
SQL> @/home/mzl/percent_used_tablespace.sql
SQL> l
select a.tablespace_name,a.bytes "Sum",a.bytes-b.bytes "used",b.bytes "free",
round(((a.bytes-b.bytes)/a.bytes)*,) "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
SQL> / 或者创建视图:
create view percent
as
select a.tablespace_name,a.bytes// "Sum MB",(a.bytes-b.bytes)// "used MB",b.bytes// "free MB",
round(((a.bytes-b.bytes)/a.bytes)*,) "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; SQL> select * from percent; 查看表空间的数据文件是否是自动扩展:
SQL> select file_name,tablespace_name,autoextensible from dba_data_files FILE_NAME TABLESPACE_NAME AUT
--------------------------------------------- ------------------------------ ---
/u01/app/oracle/oradata/orcl/risenet.dbf RISENET
/u01/app/oracle/oradata/orcl/perfstat.dbf PERFSTAT NO
/u01/app/oracle/oradata/orcl/example01.dbf EXAMPLE YES
/u01/disk1/users01.dbf USERS YES
/u01/app/oracle/oradata/orcl/sysaux01.dbf SYSAUX YES
/u01/app/oracle/oradata/orcl/undotbs01.dbf UNDOTBS1
/u01/disk2/system01.dbf SYSTEM YES
/u01/app/oracle/oradata/orcl/undotbs02.dbf UNDOTBS2 NO
/u01/disk1/pioneer_data.dbf PIONEER_DATA YES
/u01/disk2/pioneer_indx.dbf PIONEER_INDX NO
/u01/disk3/pioneer_undo.dbf PIONEER_UNDO NO FILE_NAME TABLESPACE_NAME AUT
--------------------------------------------- ------------------------------ ---
/u01/app/oracle/oradata/orcl/paul01.dbf PAUL NO
/u01/disk1/wenchuan.dbf WENCHUAN NO rows selected. 比如表空间PIONEER_INDX已经用了83.%,数据文件不能自动扩展,可以修改成自动扩展,以免数据写满数据文件。 SQL> alter database datafile '/u01/disk2/pioneer_indx.dbf' autoextend on; Database altered. SQL> select file_name,tablespace_name,autoextensible from dba_data_files where tablespace_name='PIONEER_INDX'; FILE_NAME TABLESPACE_NAME AUT
--------------------------------------------- ------------------------------ ---
/u01/disk2/pioneer_indx.dbf PIONEER_INDX YES 或者给表空间多加一个自动扩展的数据文件,如果有多个硬盘,可以增加多个数据文件(这样多数据库系统的并发性比较好)
SQL> alter tablespace pioneer_indx add datafile size 30M; Tablespace altered. SQL> select file_name,tablespace_name,bytes// "MB"
from dba_data_files
where tablespace_name='PIONEER_INDX';