1. Check the error log for the MySQL 3221 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 to see if any processes are running that could be causing the issue:

$ mysqladmin -u root -p processlist

4. Check the MySQL user privileges to see if any users have been granted too many privileges:

$ 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. Use an automated database observability tool to monitor and fix the MySQL 3221 in question. Automated database observability tools can help identify and diagnose MySQL errors quickly and accurately. They can also provide real-time monitoring and alerting of MySQL performance issues, allowing for faster resolution of any MySQL 3221 errors.