• mysql查询数据库和数据表占用内存大小


    -- 查看所有数据库容量大小
    select
    table_schema as '数据库',
    sum(table_rows) as '记录数',
    sum(truncate(data_length/1024/1024/1024, 2)) as '数据容量(GB)',
    sum(truncate(index_length/1024/1024/1024, 2)) as '索引容量(GB)'
    from information_schema.tables
    group by table_schema
    order by sum(data_length) desc, sum(index_length) desc;

    -- 查看指定数据库容量大小
    select
    table_schema as '数据库',
    sum(table_rows) as '记录数',
    sum(truncate(data_length/1024/1024/1024, 2)) as '数据容量(GB)',
    sum(truncate(index_length/1024/1024/1024, 2)) as '索引容量(GB)'
    from information_schema.tables

    where table_schema=‘数据库名’;

    -- 查看所有数据库各表容量大小
    select
    table_schema as '数据库',
    table_name as '表名',
    table_rows as '记录数',
    truncate(data_length/1024/1024, 2) as '数据容量(MB)',
    truncate(index_length/1024/1024, 2) as '索引容量(MB)'
    from information_schema.tables
    order by data_length desc, index_length desc;

    -- 查看指定数据库表容量大小
    select
    table_schema as '数据库',
    table_name as '表名',
    table_rows as '记录数',
    truncate(data_length/1024/1024, 2) as '数据容量(MB)',
    truncate(index_length/1024/1024, 2) as '索引容量(MB)'
    from information_schema.tables

    where table_schema=‘数据库表名’
    order by data_length desc, index_length desc;

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  • 原文地址:https://www.cnblogs.com/zhangliang88/p/16649443.html
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