查看 xxx 表空间是否为自动扩展:
select file_name,autoextensible,increment_by from dba_data_files;
select file_id,file_name,tablespace_name,increment_by from dba_data_files order by file_id desc;
alter database datafile '/u01/app/oracle/oradata/testdb/test01.dbf' autoextend on;
查看数据文件大小:
select TABLESPACE_NAME,FILE_NAME,BYTES/1024/1024 M from dba_data_files order by TABLESPACE_NAME;
select tablespace_name,sum(bytes) / 1024 / 1024 as MB
from dba_data_files
group by tablespace_name;
查询表空间使用率:
select total.tablespace_name,
round(total.MB,2) as Total_MB,
round(total.MB - free.MB,2) as Used_MB,
round((1 - free.MB / total.MB) * 100,2) || '%' as Used_Pct
from (select tablespace_name,sum(bytes) / 1024 / 1024 as MB
from dba_free_space
group by tablespace_name) free,
(select tablespace_name,sum(bytes) / 1024 / 1024 as MB
from dba_data_files
group by tablespace_name) total
where free.tablespace_name = total.tablespace_name;
扩展表空间:
select tablespace_name,file_id,round(bytes/(1024*1024),0) total_space from dba_data_files order by tablespace_name;
#三种扩展方法
1.alter tablespace test add datafile '/u01/test02.dbf' size 10M(自动加一个datafile)
2.alter database datafile '/u01/test.dbf' resize 20M;
3.alter database datafile '/u01/test.dbf' autoextend on next 10M maxsize 1G;
设定后查看表空间信息:
select a.tablespace_name,a.bytes total,b.bytes used,c.bytes free,(b.bytes*100)/a.bytes "% used",(c.bytes*100)/a.bytes "% free" from sys.sm$ts_avail a,sys.sm$ts_used b,sys.sm$ts_free c where a.tablespace_name=b.tablespace_name and a.tablespace_name=c.tablespace_name;
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