oracle 表空间利用率的几种查询方法

电玩女神 2022-01-30 04:39 153阅读 0赞

--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;