如何查询oracle表空间使用情况

发布网友 发布时间：2022-04-26 18:10

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懂视网 时间：2022-04-30 01:16

转自：http://www.cnblogs.com/xwdreamer/p/3511047.html

参考文献

文献1：http://blog.itpub.net/24104518/viewspace-730682，字符有格式，需要清理一下

文献2：http://www.cnblogs.com/fengyun627/archive/2009/07/27/1532551.html

文献3：http://blog.csdn.net/hproc/article/details/7372265

sql语句格式化：http://web.chacuo.net/formatsql

背景

今天发现有一张采样表从1月5号开始不记录数据了，所以想查看一下表空间使用率，在网上零零散散找了很多资料，现在记录如下，也不知道哪一个最准确。还有一个就是网上拷贝的sql代码格式太乱了，不好看，找到一个在线格式化工具。

参考1

--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 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;

上述语句查询结果如下图所示：

参考2：

SELECT a.tablespace_name   "表空间名",
 total     "表空间大小",
 free     "表空间剩余大小",
 ( total - free )    "表空间使用大小",
 Round(( total - free ) / total, 4) * 100 "使用率 %"
FROM (SELECT tablespace_name,
  Sum(bytes) free
 FROM DBA_FREE_SPACE
 GROUP BY tablespace_name) a,
 (SELECT tablespace_name,
  Sum(bytes) total
 FROM DBA_DATA_FILES
 GROUP BY tablespace_name) b
WHERE a.tablespace_name = b.tablespace_name

查询结果

参考3

SELECT TABLESPACE_NAME "表空间",
 To_char(Round(BYTES / 1024, 2), ‘99990.00‘)
 || ‘‘  "实有",
 To_char(Round(FREE / 1024, 2), ‘99990.00‘)
 || ‘G‘  "现有",
 To_char(Round(( BYTES - FREE ) / 1024, 2), ‘99990.00‘)
 || ‘G‘  "使用",
 To_char(Round(10000 * USED / BYTES) / 100, ‘99990.00‘)
 || ‘%‘  "比例"
FROM (SELECT A.TABLESPACE_NAME    TABLESPACE_NAME,
  Floor(A.BYTES / ( 1024 * 1024 ))  BYTES,
  Floor(B.FREE / ( 1024 * 1024 ))  FREE,
  Floor(( A.BYTES - B.FREE ) / ( 1024 * 1024 )) USED
 FROM (SELECT TABLESPACE_NAME TABLESPACE_NAME,
   Sum(BYTES) BYTES
  FROM DBA_DATA_FILES
  GROUP BY TABLESPACE_NAME) A,
  (SELECT TABLESPACE_NAME TABLESPACE_NAME,
   Sum(BYTES) FREE
  FROM DBA_FREE_SPACE
  GROUP BY TABLESPACE_NAME) B
 WHERE A.TABLESPACE_NAME = B.TABLESPACE_NAME)
--WHERE TABLESPACE_NAME LIKE ‘CDR%‘ --这一句用于指定表空间名称
ORDER BY Floor(10000 * USED / BYTES) DESC;

查询结果

select tablespace_name,
 max_gb,
 used_gb,
 round(100 * used_gb / max_gb) pct_used
 from (select a.tablespace_name tablespace_name,
  round((a.bytes_alloc - nvl(b.bytes_free, 0)) / power(2, 30),
   2) used_gb,
  round(a.maxbytes / power(2, 30), 2) max_gb
  from (select f.tablespace_name,
   sum(f.bytes) bytes_alloc,
   sum(decode(f.autoextensible,
     ‘YES‘,
     f.maxbytes,
     ‘NO‘,
     f.bytes)) maxbytes
   from dba_data_files f
   group by tablespace_name) a,
  (select f.tablespace_name, sum(f.bytes) bytes_free
   from dba_free_space f
   group by tablespace_name) b
  where a.tablespace_name = b.tablespace_name(+)
 union all
 select h.tablespace_name tablespace_name,
  round(sum(nvl(p.bytes_used, 0)) / power(2, 30), 2) used_gb,
  round(sum(decode(f.autoextensible,
    ‘YES‘,
    f.maxbytes,
    ‘NO‘,
    f.bytes)) / power(2, 30),
   2) max_gb
  from v$temp_space_header h, v$temp_extent_pool p, dba_temp_files f
  where p.file_id(+) = h.file_id
  and p.tablespace_name(+) = h.tablespace_name
  and f.file_id = h.file_id
  and f.tablespace_name = h.tablespace_name
  group by h.tablespace_name)
order by 4;

（转）oracle表空间使用率统计查询

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热心网友 时间：2022-04-29 22:24

查询表空间剩余容量

select tablespace_name,sum(bytes)/1024/1024  from dba_free_space group by tablespace_name;

查询表空间总大小

select tablespace_name,sum(bytes)/1024/1024 from dba_data_files group by tablespace_name;

热心网友 时间：2022-04-29 23:42