oracle表空間查詢sql

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作者：xwdreamer

出處：http://www.cnblogs.com/xwdreamer

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參考文獻

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

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

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

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

背景

今天發現有一張採樣表從1月5號開始不記錄數據了，所以想查看一下表空間使用率，在網上零零散散找了很多資料，現在記錄如下，也不知道哪一個最準確。還有一個就是網上拷貝的sql代碼格式太亂了，不好看，找到一個在線格式化工具。

參考1

--查詢表空間使用情況
SELECT Upper(F.TABLESPACE_NAME)         "表空間名",
       D.TOT_GROOTTE_MB                 "表空間大小(M)",
       D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空間(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                    "空閒空間(M)",
       F.MAX_BYTES                      "最大塊(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

--查詢表空間的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;

--查詢表空間的總容量
select tablespace_name, sum(bytes) / 1024 / 1024 as MB from dba_data_files group by tablespace_name;
--查詢表空間使用率
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;

上述語句查詢結果如下圖所示：

 

參考2：

SELECT a.tablespace_name                        "表空間名",
       total                                    "表空間大小",
       free                                     "表空間剩餘大小",
       ( total - free )                         "表空間使用大小",
       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

查詢結果

 

參考3

SELECT TABLESPACE_NAME "表空間",
       To_char(Round(BYTES / 1024, 2), '99990.00')
       || ''           "實有",
       To_char(Round(FREE / 1024, 2), '99990.00')
       || 'G'          "現有",
       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%' --這一句用於指定表空間名稱
ORDER  BY Floor(10000 * USED / BYTES) DESC;

查詢結果

 

 

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;