前提:总记录4000多万条,是删除部分数据,而不是全部。
参考 https://zhuanlan.zhihu.com/p/20209766
https://blog.csdn.net/u013276277/article/details/90767000
最终采用:
按时间手动批次删除数据
// 3534158 rows affected (1 min 29.85 sec)
delete from operation_alarm where create_time < '2019-07-01';
// 3495443 rows affected (1 min 27.23 sec)
delete from operation_alarm where create_time < '2019-08-01';