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查看oracle数据库----size

原创 Linux操作系统 作者:jx_yu 时间:2012-06-04 13:25:13 0 删除 编辑
查看物理size和实际size
select name,sum(dbsz)/1024/1024 "Physical siZe MB" from
(select sum(bytes) dbsz from dba_data_files
union all
select sum(bytes) dbsz from dba_temp_files
union all
select sum(bytes) dbsz from v$log),v$database
group by name


OR

select name,sum(a.dbsz)/1024/1024 "Physical siZe MB",b.actsz/1024/1024 "Actual Size in Mb"
from (select sum(bytes) dbsz from dba_data_files
union all
select sum(bytes) dbsz from dba_temp_files
union all
select sum(bytes) dbsz from v$log) a ,
(select sum(bytes) actsz from dba_extents) b ,v$database
group by name,b.actsz

NAME      Physical siZe MB Actual Size in Mb
--------- ---------------- -----------------
ORA11G          28348.8125         22796.625
 
查询表空间使用情况
  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 1
 
--查询表空间的free space
  select tablespace_name,
  count(*) as extends,
  round(sum(bytes) / 1024 / 1024, 2) as MB,
  sum(blocks) as blocks
  from dba_free_space
  group by tablespace_name;
--查询表空间的总容量
  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 a.tablespace_name, round(a.bytes / 1024 / 1024) "Sum MB",
       round((a.bytes - b.bytes) / 1024 / 1024) "used MB",
       round(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;

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