1. Check the error log for the MySQL 1748 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 queries are running for an extended period of time:
$ mysqladmin -u root -p processlist
4. Check the MySQL status to see if there are any issues with the server:
$ mysqladmin -u root -p status
5. Check the MySQL variables to see if any of them are set incorrectly:
$ mysqladmin -u root -p variables
6. Check the MySQL user privileges to see if any of them are set incorrectly:
$ mysql -u root -p -e "SELECT * FROM mysql.user;"
7. Check the MySQL database tables to see if any of them are corrupted:
$ mysqlcheck -u root -p --all-databases
8. Check the MySQL query cache to see if any of the queries are taking too long to execute:
$ mysqladmin -u root -p flush-query-cache
9. Check the MySQL slow query log to see if any of the queries are taking too long to execute:
$ mysqladmin -u root -p slow-query-log
10. Check the MySQL replication status to see if any of the slaves are lagging behind:
$ mysqladmin -u root -p show-slave-status
11. Check the MySQL performance metrics to see if any of the metrics are out of range:
$ mysqladmin -u root -p extended-status
12. Check the MySQL system variables to see if any of them are set incorrectly:
$ mysqladmin -u root -p variables
13. Check the MySQL log files to see if any of them are corrupted:
$ mysqlbinlog -u root -p /var/log/mysql/mysql-bin.log
14. Check the MySQL system tables to see if any of them are corrupted:
$ mysqlcheck -u root -p --all-databases
15. Check the MySQL query cache to see if any of the queries are taking too long to execute:
$ mysqladmin -u root -p flush-query-cache
16. Check the MySQL slow query log to see if any of the queries are taking too long to execute:
$ mysqladmin -u root -p slow-query-log
17. Check the MySQL replication status to see if any of the slaves are lagging behind:
$ mysqladmin -u root -p show-slave-status
18. Use an automated database observability tool to monitor and fix the MySQL 1748 in question. Automated database observability tools can provide real-time insights into the performance and health of your database, allowing you to quickly identify and fix any issues that may arise. These tools can also provide detailed metrics and logs that can help you diagnose and troubleshoot any issues that may arise.