oracle表空间使用率统计查询

「爱情、让人受尽委屈。」 2023-10-18 21:02 31阅读 0赞

## [oracle表空间使用率统计查询][oracle] ##

### 参考文献 ###

文献1：[http://blog.itpub.net/24104518/viewspace-730682][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][http_www.cnblogs.com_fengyun627_archive_2009_07_27_1532551.html]

文献3：[http://blog.csdn.net/hproc/article/details/7372265][http_blog.csdn.net_hproc_article_details_7372265]

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

![08165705-e6fa2991867e4f4483be3426cf780742.png][]

#### 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

![08170605-b57f4c3c6c144f1aa5a1ad7009856e17.png][]

#### 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

![08171148-9f54bf911c1948c3836662e0383563c8.png][]

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;

作者：[xwdreamer][]

出处：[http://www.cnblogs.com/xwdreamer][xwdreamer]

欢迎任何形式的转载，但请务必注明出处。

[oracle]: https://www.cnblogs.com/xwdreamer/p/3511047.html
[http_blog.itpub.net_24104518_viewspace-730682]: http://blog.itpub.net/24104518/viewspace-730682
[http_www.cnblogs.com_fengyun627_archive_2009_07_27_1532551.html]: http://www.cnblogs.com/fengyun627/archive/2009/07/27/1532551.html
[http_blog.csdn.net_hproc_article_details_7372265]: http://blog.csdn.net/hproc/article/details/7372265
[http_web.chacuo.net_formatsql]: http://web.chacuo.net/formatsql
[08165705-e6fa2991867e4f4483be3426cf780742.png]: https://images0.cnblogs.com/blog/80896/201401/08165705-e6fa2991867e4f4483be3426cf780742.png
[08170605-b57f4c3c6c144f1aa5a1ad7009856e17.png]: https://images0.cnblogs.com/blog/80896/201401/08170605-b57f4c3c6c144f1aa5a1ad7009856e17.png
[08171148-9f54bf911c1948c3836662e0383563c8.png]: https://images0.cnblogs.com/blog/80896/201401/08171148-9f54bf911c1948c3836662e0383563c8.png
[xwdreamer]: http://www.cnblogs.com/xwdreamer