MySQL 切換資料庫、使用者卡死：“You can turn off this feature to get a quicker startup with -A“處理方法

資料量很大的話，正常切換資料庫會把裡面所有的表周遊一遍，會很慢甚至是卡死。

解決方法：

登入的時候直接在最後面加一個 -A 就行了。

[root@localhost ~]# "/usr/local/mysql-8.0.11/bin/mysql" -uroot -p123456 -A      

實戰示範：

我示範的資料庫就是一個資料量很大的資料庫，切換資料庫時半天也沒有好。

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| ncc_0807auto       |
| ncc_0807mysql      |
| performance_schema |
| sys                |
+--------------------+
6 rows in set (0.00 sec)

mysql> use ncc_0807mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
      

加上參數後可以看到直接就切換成功了。

[root@localhost ~]# "/usr/local/mysql-8.0.11/bin/mysql" -uroot -p123456 -A
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 41
Server version: 8.0.11 MySQL Community Server - GPL

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| ncc_0807auto       |
| ncc_0807mysql      |
| performance_schema |
| sys                |
+--------------------+
6 rows in set (0.01 sec)

mysql> use ncc_0807mysql;
Database changed
mysql>       

喜歡的點個贊❤吧！

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