You can use the Logging Level Settings tool to temporarily override the severity settings in the prlogging.xml file for the current node, and control which logging events display in the Pega log.
For example, you can change the logging level for activities in the Work- class from FATAL to DEBUG. Thereafter, Log-Message method statement (or oLog() calls in Java steps) that have a severity setting of DEBUG or lower display in the Pega log.
To access the Logging Level tool, click Designer Studio> System > Operations > Logs .
The system adds an entry to the Pega log identifying your Operator ID and the date and time of the change.
The changes you make take effect immediately and remain in force until the node is stopped, or until you or another developer use this tool again to reset them. The prlogging.xml file is not updated.
Logging operations on nodes other than your current node is unaffected.