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  • postgres-后台常用命令笔记

    1、断开数据库的所有连接

    select pg_terminate_backend(pid) from (select pid from pg_stat_activity where datname = 'xxx' ) a;

    用于删库时提示:database "xxx" is being accessed by other users 详细:There are 2 other sessions using the database

    2、查看长事务并杀掉长事务会话

    SELECT * FROM pg_stat_activity
    
    WHERE STATE <> 'idle'
    
            AND pg_backend_pid () != pid
    
            AND ( backend_xid IS NOT NULL OR backend_xmin IS NOT NULL )
    
            AND EXTRACT (epoch FROM ( now() - xact_start )) > 60
    
    ORDER BY xact_start;  
    
    select pg_terminate_backend(pid);pid为上一个结果集中的pid

    3、杀掉空闲语句

    select pg_terminate_backend(pid) from pg_stat_activity where state='idle';

    4、批量造数据

    INSERT INTO tbl_name ( column1, column2,column3,column4 ) 
    SELECT generate_series ( 1, 100000 ),md5( random() :: TEXT ),clock_timestamp(),RANDOM();

     

     

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  • 原文地址:https://www.cnblogs.com/yb38156/p/13157358.html
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