mysqld.log错误日志如下：
2018-10-15 19:38:17 4341 [ERROR] /usr/local/mysql/bin/mysqld: Incorrect information in file: './performance_schema/accounts.frm' 2018-10-15 19:38:17 4341 [ERROR] /usr/local/mysql/bin/mysqld: Incorrect information in file: './performance_schema/cond_instances.frm'
修复方法为： /usr/local/mysql/bin/mysql_upgrade -h127.0.0.1 -uroot -p'111111'
修复后记得重启下数据库 /etc/init.d/mysqld restart
然后再去查看日志里是否出现performance_schema 报错
