查询Oracle表空间信息
1.查看当前用户每个表占用空间的大小:
Select Segment_Name,Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name;
2.查看每个表空间占用空间的大小:
Select Tablespace_Name,Sum(bytes)/1024/1024 From Dba_Segments Group By Tablespace_Name;
3.查询出当前用户的表所占用的空间大小,并按大小进行降序排列:
Select Segment_Name,Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name order by Sum(bytes)/1024/1024 desc;
4.查询出系统表空间的大小,并按大小进行降序排列(需要SYSDBA的权限):
Select Tablespace_Name,Sum(bytes)/1024/1024 From Dba_Segments Group By Tablespace_Name order by Sum(bytes)/1024/1024 desc;
5.服务器空间
[root@localhost ~]# df -h
Filesystem 容量 已用 可用 已用% 挂载点
/dev/mapper/VolGroup00-LogVol00
21G 16G 3.9G 80% /
/dev/mapper/VolGroup00-LogVol01
40G 38G 4.0M 100% /app
/dev/cciss/c0d0p1 99M 15M 80M 16% /boot
none 3.9G 0 3.9G 0% /dev/shm
/app目录是oracle目录,总共40G,已经用了38G 使用了100%
6.oracle查询表空间使用情况语句
SELECT 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_BYTES FROM SYS.DBA_FREE_SPACE GROUP BY TABLESPACE_NAME) F, (SELECT DD.TABLESPACE_NAME, ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB FROM SYS.DBA_DATA_FILES DD GROUP BY DD.TABLESPACE_NAME) D WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME ORDER BY 4 DESC;
或者
select f.tablespace_name, a.total,u.used,f.free,round((u.used/a.total)*100)"% used", round((f.free/a.total)*100) "% Free" from (select tablespace_name, sum(bytes/(1024*1024)) total from dba_data_files group by tablespace_name) a, (select tablespace_name, round(sum(bytes/(1024*1024))) used from dba_extents group by tablespace_name) u, (select tablespace_name, round(sum(bytes/(1024*1024))) free from dba_free_space group by tablespace_name) f WHERE a.tablespace_name = f.tablespace_name and a.tablespace_name = u.tablespace_name;
文章来源:http://www.cnblogs.com/jvsnet/archive/2010/11/04/1868743.html