MySQL 1223

This error occurs when an UPDATE statement is attempted while a read lock is in place. It indicates that the UPDATE statement cannot be executed while the read lock is active.

How It Affects Your App

The error 1223 ER_CANT_UPDATE_WITH_READLOCK prevents an application from updating a table while a read lock is in place. This can cause the application to become unresponsive or to crash, as it is unable to complete the requested operation. It can also lead to data inconsistencies, as the application is unable to update the table with the latest information. This can have a significant impact on the application's performance and reliability.

How To Fix

1. Check the error log for the MySQL 1223 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 any of the variables are set too low:
$ mysqladmin -u root -p status
5. Check the MySQL user table to see if any users have been granted too many privileges:
$ mysql -u root -p -e "SELECT * FROM mysql.user;"
6. Check the MySQL table structure to see if any tables are corrupted:
$ mysqlcheck -u root -p --check --all-databases
7. Check the MySQL query cache to see if it is enabled and configured correctly:
$ mysql -u root -p -e "SHOW VARIABLES LIKE 'query_cache_%';"
8. Use an automated database observability tool to monitor and fix the MySQL 1223 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. Additionally, these tools can provide detailed metrics and logs that can help you identify the root cause of any issues and take corrective action.

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