Oracle数据库表空间容量调整（表空间缩容脚本）脚本

--1、获取需要释放空间的表空间信息（包含oracle database自有表空间）

--drop table system.tbs_detail;

create table system.tbs_detail 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;

--select * from system.tbs_detail order by "Sum_MB" desc,"free_MB" desc;

--2、获取需要释放空间的应用表空间数据文件使用情况

--drop table system.datafile_space;

create table system.datafile_space as

select a.TABLESPACE_NAME,

a.FILE_NAME,

a.BYTES / 1024 / 1024 total,

b.sum_free / 1024 / 1024 free

from dba_data_files a,

(select file_id, sum(bytes) sum_free

from dba_free_space

group by file_id) b

where a.FILE_ID = b.file_id

and a.TABLESPACE_NAME in (select tablespace_name

from system.tbs_detail

where (tablespace_name like '%CQLT%' or

tablespace_name like '%CQST%'

or tablespace_name like 'TS%' or tablespace_name like 'IDX%'

or tablespace_name like '%HX%')

and "Sum_MB" > 100);

--select * from system.datafile_space;

--3、生成数据文件大小重置脚本，在每个数据文件当前实际使用空间大小基础上增加 100m 空间

select 'alter database datafile ''' || file_name || ''' resize ' ||

round(to_number(total - free + 100),0) || ' M;'

from system.datafile_space;

--查看 ASM 磁盘组使用情况

sqlplus / as sysdba <

set feed off

set linesize 200

set pagesize 200

set echo off

spool /home/oracle/check_log/chktbs.log append

select name,state,type,total_mb,free_mb from v\$asm_diskgroup;

spool off

quit

EOF