1. Check the MySQL 123 error log for any errors that may be causing the issue.

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

2. Check the MySQL 123 configuration file for any misconfigurations.

$ cat /etc/mysql/my.cnf

3. Check the MySQL 123 process list for any suspicious processes.

$ mysqladmin -u root -p processlist

4. Check the MySQL 123 system variables for any misconfigurations.

$ mysqladmin -u root -p variables

5. Check the MySQL 123 database tables for any corruptions.

$ mysqladmin -u root -p check table

6. Check the MySQL 123 system status for any issues.

$ mysqladmin -u root -p status

7. Use an automated database observability tool to monitor and fix the MySQL 123 in question. Automated database observability tools can provide real-time insights into the performance and health of the database, allowing for quick and easy troubleshooting and resolution of any issues.