On the System info page, you can find all general system information.
Figure 1-74 The System info page
Fatal: are very severe errors that prevents the system from running.
Error: logs all unhandled exceptions; the system is still running.
Warning: designates potentially harmful situations that can effect the end user, but probably does not require immediate intervention.
Info: information that is useful to the running and management of your system.
Debug: designates fine-grained informational events that are most useful to debug an application.
Trace: provides even more details than debug. Selecting this option increases memory usage drastically.