Depending on the issue, it may be required to increase the log level in Fisheye/Crucible for a particular set of classes.
If you have been asked to turn on Debug Logging, you can enable this by going to the Fisheye Admin Page > Global Settings > Server > Debug Logging. General Debug Logging does not require a restart and is usually a good place to start. This page contains the list of the available loggers and their usage that augment the general Debug Logging.
This may be required when some pages/actions are slow to load and more details about the queries are required.
Add the following block of code to your <FishEye install directory>/log4j.xml file: