oracle表空间总大小 剩余大小
1、要知道表空间大小，就要明白两种增加表空间大小的方式第一种：格式化数据文件初始大小并设置自增长到最大值create tablespace d_test1 datafile '/test1_data/datafile01.dbf' size 10m autoextend on next 5m maxsize 100m;
3、不管是第一种还是第二种方式数据的物理文件大小都是dba_data_files表bytes列的值，而bytes列可能是已经被用满了，或者还没有用满还有剩余，但是不管怎么样，我们可以根据bytes列和maxbytes获取表空间总大小。
5、统计增加表空见两种方式的数据文件大小总值，也就是统计表空间总大小WITH TABLESPACE_TOTAL AS(SELECT tablespace_name,sum(MAXBYTES) TOTAL FROM DBA_DATA_FILES T WHERE T.TABLESPACE_NAME NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')AND T.AUTOEXTENSIBLE='YES' group by tablespace_nameUNION ALLSELECT tablespace_name,sum(bytes) TOTAL FROM DBA_DATA_FILES T WHERE T.TABLESPACE_NAME NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')AND T.AUTOEXTENSIBLE='NO' group by tablespace_name)SELECT TABLESPACE_NAME,SUM(TOTAL) TOTAL FROM TABLESPACE_TOTAL GROUP BY TABLESPACE_NAME
7、根据dba_data_files和dba_segments统计表空间总大小和剩余大小SELECT A.TABLESPACE_NAME,B.TOTAL/1024/1024||'M',(B.TOTAL-A.USE)/1024/1024||'M' FREE FROM(select TABLESPACE_NAME,sum(bytes) as USE from dba_segments where tablespace_name NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')GROUP BY TABLESPACE_NAME) A ,(WITH TABLESPACE_TOTAL AS(SELECT tablespace_name,sum(MAXBYTES) TOTAL FROM DBA_DATA_FILES TWHERE T.TABLESPACE_NAME NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')AND T.AUTOEXTENSIBLE='YES' group by tablespace_nameUNION ALLSELECT tablespace_name,sum(bytes) TOTAL FROM DBA_DATA_FILES T WHERE T.TABLESPACE_NAME NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')AND T.AUTOEXTENSIBLE='NO' group by tablespace_name) SELECT TABLESPACE_NAME,SUM(TOTAL) TOTAL FROM TABLESPACE_TOTAL GROUP BY TABLESPACE_NAME) BWHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME
9、根据dba_data_files和dba_free_space统计表空间大小和表空间剩余大小SELECT A.TABLESPACE_NAME,B.TOTAL/1024/1024||'M',(B.TOTAL-A.USE)/1024/1024||'M' FREE FROM(select c.tablespace_name,(c.p_use-d.p_free) as use from(select tablespace_name,sum(bytes) as p_use from dba_data_fileswhere tablespace_name NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')group by tablespace_name) C,(select tablespace_name,sum(bytes) as p_free from dba_free_spacewhere tablespace_name NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')group by tablespace_name) D where C.tablespace_name=D.tablespace_name) A ,(WITH TABLESPACE_TOTAL AS(SELECT tablespace_name,sum(MAXBYTES) TOTAL FROM DBA_DATA_FILES TWHERE T.TABLESPACE_NAME NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')AND T.AUTOEXTENSIBLE='YES' group by tablespace_nameUNION ALLSELECT tablespace_name,sum(bytes) TOTAL FROM DBA_DATA_FILES T WHERE T.TABLESPACE_NAME NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')AND T.AUTOEXTENSIBLE='NO' group by tablespace_name) SELECT TABLESPACE_NAME,SUM(TOTAL) TOTAL FROM TABLESPACE_TOTAL GROUP BY TABLESPACE_NAME) BWHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME
