How is the DEBUG logging level most commonly used?

The DEBUG logging level is primarily used to diagnose problems in the code when it fails to perform as expected. It provides developers with detailed insights about the application's internal workings and the flow of execution, allowing them to identify what may have gone wrong during runtime.

When DEBUG level logging is enabled, it often includes verbose output about variable values, method calls, and other contextual information that can assist in pinpointing issues. This level of detail is particularly useful during the development and testing phases, as it allows developers to trace the execution path of the application and understand the state of the application at various points in time.

In contrast, while capturing error events during the user experience and providing information for performance tuning are important tasks, they typically fall under higher logging levels such as ERROR or INFO. Logging method entry and exit is also useful but is more commonly associated with tracing or profiling, rather than the broader diagnostic capability that DEBUG logging serves. Thus, using DEBUG effectively aids in resolving issues and ensuring the application operates as intended.