day11_表空间过高处理

一、查看当前所有表空间使用情况
set pages 300set lines 300SELECT UPPER(F.TABLESPACE_NAME) "表空间名",D.TOT_GROOTTE_MB "表空间大小(M)",D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) / D.TOT_GROOTTE_MB * 100,2),'990.99') || '%' "使用比",F.TOTAL_BYTES "空闲空间(M)",F.MAX_BYTES "最大块(M)"FROM (SELECT TABLESPACE_NAME,ROUND(SUM(BYTES) / (1024 * 1024), 2) TOTAL_BYTES,ROUND(MAX(BYTES) / (1024 * 1024), 2) MAX_BYTESFROM SYS.DBA_FREE_SPACEGROUP BY TABLESPACE_NAME) F,(SELECT DD.TABLESPACE_NAME,ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MBFROM SYS.DBA_DATA_FILES DDGROUP BY DD.TABLESPACE_NAME) DWHERE D.TABLESPACE_NAME = F.TABLESPACE_NAMEORDER BY 4 desc ;

二、通过上面的查询指定使用率过高的表空间，找出此表空间中最占空间的前20个对象
Select OWNER||','||SEGMENT_NAME||','||SEGMENT_TYPE||','||total from (select OWNER,SEGMENT_NAME,SEGMENT_TYPE,bytes/1024/1024 total from dba_segments where TABLESPACE_NAME='指定表空间的名字' order by bytes/1024/1024 desc ) where rownum <21;

来自为知笔记(Wiz)