1. Check the error log for the MySQL 149 error:

$ tail -f /var/log/mysql/error.log

2. Check the MySQL configuration file for any misconfigurations:

$ cat /etc/mysql/my.cnf

3. Check the MySQL process list for any suspicious activity:

$ mysqladmin -u root -p processlist

4. Check the MySQL user privileges for any misconfigurations:

$ mysql -u root -p -e "SELECT User, Host, Password FROM mysql.user;"

5. Check the MySQL database tables for any corruptions:

$ mysqlcheck -u root -p --all-databases

6. Restart the MySQL service:

$ service mysql restart

7. Use an automated database observability tool to monitor and fix the MySQL 149 in question. Automated database observability tools can provide real-time visibility into the performance and health of your database, allowing you to quickly identify and fix any issues that arise. They can also provide detailed insights into query performance, allowing you to optimize your database for maximum performance.