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  • Oracle管理监控之Oracle数据库存储空间监控

    1、监控表空间使用率

    基表:dba_data_files、dba_free_space

    脚本:

    select a.tablespace_name,

    round((a.maxbytes / 1024 / 1024 / 1024), 2) "sum G",

    round((a.bytes / 1024 / 1024 / 1024), 2) "datafile G",

    round(((a.bytes - b.bytes) / 1024 / 1024 / 1024), 2) "used G",

    round(((a.maxbytes - a.bytes + b.bytes) / 1024 / 1024 / 1024), 2) "free G",

    round(((a.bytes - b.bytes) / a.maxbytes) * 100, 2) "percent_used(%)"

    from (select tablespace_name, sum(sumnow) bytes, sum(summax) maxbytes

    from (select t1.tablespace_name,

    sum(t1.bytes) sumnow,

    sum(t1.maxbytes) summax

    from dba_data_files t1

    where t1.maxbytes <> 0

    group by t1.tablespace_name

    union all

    select t2.tablespace_name,

    sum(t2.bytes) sumnow,

    sum(t2.bytes) summax

    from dba_data_files t2

    where t2.maxbytes = 0

    group by t2.tablespace_name)

    group by tablespace_name) a,

    (select tablespace_name, sum(bytes) bytes

    from dba_free_space

    group by tablespace_name) b

    where a.tablespace_name = b.tablespace_name

    order by ((a.bytes - b.bytes) / a.maxbytes) desc;

    2、创建表空间时指定最大值时查询表空间使用率脚本:

    select a.tablespace_name,

    round((a.maxbytes / 1024 / 1024 / 1024), 2) "sum G",

    round((a.bytes / 1024 / 1024 / 1024), 2) "datafile G",

    round(((a.bytes - b.bytes) / 1024 / 1024 / 1024), 2) "used G",

    round(((a.maxbytes - a.bytes + b.bytes) / 1024 / 1024 / 1024), 2) "free G",

    round(((a.bytes - b.bytes) / a.maxbytes) * 100, 2) "percent_used(%)"

    from (select tablespace_name, sum(bytes) bytes, sum(maxbytes) maxbytes

    from dba_data_files

    where maxbytes != 0

    group by tablespace_name) a,

    (select tablespace_name, sum(bytes) bytes

    from dba_free_space

    group by tablespace_name) b

    where a.tablespace_name = b.tablespace_name

    order by ((a.bytes - b.bytes) / a.maxbytes) desc;

    3、查看数据文件状态

    select t.tablespace_name,

           t.file_id,

           t.file_name,

           t.autoextensible,

    ROUND(t.maxbytes / 1024 / 1024 / 1024, 2) || 'G' AS MAXBYTES,

    ROUND(t.bytes / 1024 / 1024 / 1024, 2) || 'G' AS BYTES,

    ROUND(t.user_bytes / 1024 / 1024 / 1024, 2) || 'G' AS USER_BYTES

    from dba_data_files t;

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  • 原文地址:https://www.cnblogs.com/wcwen1990/p/6656537.html
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