Mysql下自动删除指定时间以前的记录的操作方法

delete From webserver_monitormemory where DATE(time) <= DATE(DATE_SUB(NOW(),INTERVAL 2 day));

DELIMITER //
CREATE PROCEDURE autodel()
  -> BEGIN
  -> delete From webserver_monitormemory where DATE(time) <= DATE(DATE_SUB(NOW(),INTERVAL 2 day));
  -> END
  -> //
DELIMITER ;

CREATE EVENT `event_auto_del_memorydata`  
ON SCHEDULE EVERY 1 DAY STARTS '2017-11-20 00:00:00'  
ON COMPLETION NOT PRESERVE ENABLE DO CALL autodel();

SET GLOBAL event_scheduler = 1; 
SET @@global.event_scheduler = 1; 
SET GLOBAL event_scheduler = ON; 
SET @@global.event_scheduler = ON;

SHOW VARIABLES LIKE 'event_scheduler';
SELECT @@event_scheduler;
SHOW PROCESSLIST;&＃65279;&＃8203;

ALTER EVENT event_auto_del_memorydata ON COMPLETION PRESERVE ENABLE; //开启某事件
ALTER EVENT event_auto_del_memorydata ON COMPLETION PRESERVE DISABLE; //关闭某事件

ALTER EVENT event_time_clear_data ON 
COMPLETION PRESERVE ENABLE;

ALTER EVENT event_time_clear_data ON 
COMPLETION PRESERVE DISABLE;

DROP PROCEDURE pro_clear_data;

DROP EVENT IF EXISTS event_time_clear_data1