Which log level in ArcGIS Server provides the most detailed output?

The Debug log level in ArcGIS Server is designed to provide the most detailed output, offering comprehensive information about the system's operation and performance. This level captures a granular view of events happening within the server, including additional context and messages about processes, system behavior, and specific operations. This detail is essential for troubleshooting and understanding the inner workings of the applications on the server, particularly when a user needs to diagnose complicated issues.

This log level is particularly valuable for developers and administrators looking to perform in-depth analysis, as it often includes stack traces and a high volume of logs that lower log levels do not provide. While the other log levels—Error, Warning, and Information—offer important insights, they mainly focus on alerts and general operational messages without diving into the specifics of the internal workings, making Debug the most suitable choice for detailed examination.