MySQL 165

This error occurs when a BLOB/TEXT column is used in a key specification without a key length. MySQL 165 indicates that the key length must be specified for BLOB/TEXT columns.

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How It Affects Your App

The impact of MySQL 165 BLOB/TEXT column used in key specification without a key length on the application is that it can cause the application to fail when attempting to perform certain operations. This can lead to data loss or corruption, as well as decreased performance due to the inability to properly index the data. Additionally, the application may be unable to properly query the data, leading to incorrect results or errors. In some cases, the application may even crash due to the lack of a key length.

How To Fix

1. Check the error log for the MySQL 165 instance to identify the root cause of the issue.

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

2. Check the configuration of the MySQL 165 instance to identify any misconfigurations.

$ sudo cat /etc/mysql/my.cnf

3. Check the status of the MySQL 165 instance to identify any issues with the running processes.

$ sudo systemctl status mysql

4. Restart the MySQL 165 instance to reset any misconfigurations or issues with the running processes.

$ sudo systemctl restart mysql

5. Check the error log again to ensure the issue has been resolved.

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

6. Use an automated database observability tool to monitor and fix the MySQL 165 instance. Automated database observability tools can provide real-time insights into the performance and health of the MySQL 165 instance, allowing for proactive monitoring and quick resolution of any issues that may arise.

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