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    -- 查询表空间大小
    SELECT
        table_schema AS `Database`,
        table_name AS `Table`,
        ROUND((data_length + index_length) / 1024 / 1024 / 1024, 2) AS `Size`
    FROM
        information_schema.tables
    WHERE
        table_schema NOT IN ('information_schema', 'mysql', 'performance_schema', 'sys')
    ORDER BY
        `Size` DESC;

    -- 查询慢sql
    SELECT * FROM information_schema.PROCESSLIST
    WHERE COMMAND = 'Query' AND TIME > 1;

    -- 数据库用户配置权限
    -- 1查询数据库用户
    select user from mysql.user;
    -- 2创建用户
    CREATE USER ha_xx@'%' IDENTIFIED BY ‘ha_xx@P123123123’;

    -- 3查询某个用户的权限
    show grants for read_all_prd;
    -- 4给用户授权
    grant select,insert,update on ha_xx.table to read_all_prd@‘%’;