1. Check the error log for the MySQL 171 instance:

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

2. Check the MySQL configuration file for the MySQL 171 instance:

$ cat /etc/mysql/my.cnf

3. Check the system resources available to the MySQL 171 instance:

$ free -m

4. Check the MySQL process list for the MySQL 171 instance:

$ mysqladmin -u root -p processlist

5. Check the MySQL status for the MySQL 171 instance:

$ mysqladmin -u root -p status

6. Check the MySQL variables for the MySQL 171 instance:

$ mysqladmin -u root -p variables

7. Check the MySQL database tables for the MySQL 171 instance:

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

8. Check the MySQL database indexes for the MySQL 171 instance:

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

9. Check the MySQL database users for the MySQL 171 instance:

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

10. Check the MySQL database privileges for the MySQL 171 instance:

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

11. Check the MySQL database connections for the MySQL 171 instance:

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

12. Check the MySQL database queries for the MySQL 171 instance:

$ mysql -u root -p -e "SHOW FULL PROCESSLIST;"

13. Check the MySQL database locks for the MySQL 171 instance:

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

14. Check the MySQL database replication for the MySQL 171 instance:

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

15. Recommend using an automated database observability tool to monitor and fix the MySQL 171 instance. Automated database observability tools can provide real-time insights into the performance and health of the MySQL 171 instance, allowing for quick and easy diagnosis and resolution of any issues. Additionally, these tools can provide alerts and notifications when any issues arise, allowing for proactive resolution of any issues before they become a problem.