MYSQL 啟動問題

標籤：query   exe   問題   mysql登入   HERE   warning   stat   解決   table   

1、日誌中出現  [ERROR] InnoDB: The Auto-extending innodb_system data file ‘./ibdata1‘ is of a different size 640 pages (rounded down to MB) than specified in the .cnf file: initial 768 pages, max 0 (relevant if non-zero) pages! 有類似錯誤
   解決方案：在/etc/my.cnf 中修改或增加 innodb_data_file_path=ibdata1:10M:autoextend  計算方式：640頁*16K/頁 / 1024K/M = 10M
   
2、mysql.user table is damaged. Please run mysql_upgrade.
   解決方案：刪除data 目錄下的所有東西，使用 mysqld --initialize --user=mysql 命令初始化系統，保證系統能正常啟動。
   
3、mysql登入及密碼修改
   出現 error: ‘Access denied for user ‘root‘@‘localhost‘ (using password: YES)‘ 提示不能正常登入
   解決方案：
   安全啟動mysql


mysqld_safe --user=mysql --skip-grant-tables --skip-networking &


mysql


mysql> update user set authentication_string=PASSWORD(‘root‘) where user=‘root‘;
Query OK, 1 row affected, 1 warning (0.04 sec)
Rows matched: 1  Changed: 1  Warnings: 1




mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
修改成功


重新啟動mysql也成功


mysql登入後，提示修改密碼


mysql> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> set PASSWORD=Password(‘root‘);
Query OK, 0 rows affected, 1 warning (0.00 sec)


mysql> alter user [email protected] PASSWORD EXPIRE NEVER;
Query OK, 0 rows affected (0.00 sec)




mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)


密碼修改成功，密碼也不提示到期了。  

MYSQL 啟動問題