InterSystems: The power behind what matters   
Class Reference   

Manage Journaling at the Process Level Using %NOJRN
If journaling is enabled system-wide, you can stop journaling for Set and Kill operations on globals within a particular process by issuing a call to the ^%NOJRN utility from within an application or from programmer mode as follows:
Journaling remains disabled until one of the following events occurs:
Disabling journaling using DISABLE^%NOJRN does not affect mirrored databases.