The following procedure describes how to change the default thread priority on the database instance for newly running reports.
Step 1:
Open the database instance from Strategy Developer Project Source > Administration > Configuration Managers > Database Instances and select “New”.

Step 2:
Proceed through the wizard and select “Request type” for the “Set job priority by”.

Step 3:
Select Reports.

Step 4:
Set the “Processing Unit Priority” to “Medium” or "High". With this set to medium, all reports which are executed will be run at a medium priority.
