1. Check the error log for the MySQL 3189 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 table for any suspicious users:

$ mysql -u root -p -e "SELECT * FROM mysql.user;"

5. Check the MySQL grant tables for any suspicious grants:

$ mysql -u root -p -e "SELECT * FROM mysql.grant_tables;"

6. Check the MySQL system variables for any misconfigurations:

$ mysql -u root -p -e "SHOW VARIABLES;"

7. Check the MySQL system status for any misconfigurations:

$ mysql -u root -p -e "SHOW STATUS;"

8. Check the MySQL system logs for any suspicious activity:

$ mysql -u root -p -e "SHOW LOGS;"

9. Check the MySQL system tables for any suspicious activity:

$ mysql -u root -p -e "SHOW TABLES;"

10. Use an automated database observability tool to monitor and fix the MySQL 3189 in question. Automated database observability tools can help identify and diagnose issues quickly, as well as provide real-time insights into the performance and health of the database. This can help to prevent future issues and ensure that the database is running optimally.