ERROR, WARNING, INFORMATION 3默认为2,设置为3,可以用于调试连接问题,这个参数可以联机设置:mysql> set global log_error_verbosity=3; Query OK, 0 rows affected (0.00 sec)设置为3后,错误日志里面有下面的信息:2020-06-15T07:00:36.035923Z 50 [Note] [MY-010926] [Server] Access denied for user '...