oracle查询表空间的空间占用情况
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select a.tablespace_name,a.bytes bytes_used,b.largest,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 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/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 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。 1 写入文件:#vi /home/mzl/percent_used_tablespace.sql 内容: 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 导入: SQL> @/home/mzl/percent_used_tablespace.sql SQL> l 1 select a.tablespace_name,a.bytes "Sum",a.bytes-b.bytes "used",b.bytes "free", 2 round(((a.bytes-b.bytes)/a.bytes)*100,2) "percent_used" 3 from 4 (select tablespace_name,sum(bytes) bytes from dba_data_files group by tablespace_name) a, 5 (select tablespace_name,sum(bytes) bytes,max(bytes) largest from dba_free_space group by tablespace_name) b 6 where a.tablespace_name=b.tablespace_name 7* 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/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; 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 13 rows selected. 比如表空间PIONEER_INDX已经用了83.33%,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/1024/1024 "MB" from dba_data_files where tablespace_name=‘PIONEER_INDX‘;
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