Final answer:
The recommended logging level for troubleshooting complex issues is Debug.
Step-by-step explanation:
When troubleshooting complex issues, it is recommended to temporarily change the logging levels to Debug in order to gather detailed information about the issue. This level provides the most detailed logs and can help identify and debug complex problems.
By changing the logging levels to Debug, you can get access to all the information related to the issue, including all the steps and variables involved.
Once the problem has been diagnosed and resolved, the logging levels should be reverted to their original settings to avoid unnecessary log storage and performance impact.