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  • MySQL--查看数据库连接信息

    =====================================

    查看当前连接到数据库的用户和Host

    ## 查看当前连接到数据库的用户和Host ##
    
    SELECT DISTINCT 
    USER,HOST 
    FROM `information_schema`.`PROCESSLIST` P 
    WHERE P.USER NOT IN('root','repl','system user')   G

     

    =====================================

    查看每个host的当前连接数和总连接数

    SELECT * 
    FROM performance_schema.hosts;

    PS1: 系统表performance_schema.hosts在MySQL 5.6.3版本中引入,用来保存MySQL服务器启动后的连接情况。

     

    =====================================

    按照登录用户+登录服务器查看登录信息

    SELECT 
    USER as login_user,
    LEFT(HOST,POSITION(':' IN HOST)-1) AS login_ip,
    count(1) as login_count
    FROM `information_schema`.`PROCESSLIST` P 
    WHERE P.USER NOT IN('root','repl','system user') 
    GROUP BY USER,LEFT(HOST,POSITION(':' IN HOST)-1)
    ORDER BY COUNT(1) DESC;

    =====================================

    按照登录用户+数据库+登录服务器查看登录信息

    SELECT 
    DB as database_name,
    USER as login_user,
    LEFT(HOST,POSITION(':' IN HOST)-1) AS login_ip,
    count(1) as login_count
    FROM `information_schema`.`PROCESSLIST` P 
    WHERE P.USER NOT IN('root','repl','system user') 
    GROUP BY DB,USER,LEFT(HOST,POSITION(':' IN HOST)-1)
    ORDER BY COUNT(1) DESC;
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  • 原文地址:https://www.cnblogs.com/gaogao67/p/10463168.html
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