Using the following link provided by CA on purging process instances, how would one go about purging selected instances that contain the instance name of "my_test_process", without purging all the other instances such as "my_live_process"?
Is this possible?
Purge Archived Instances - CA Process Automation - 4.3.1 - CA Technologies Documentation
You cannot archive and purge specific processes, the archive and purge is a time based and impacts all completed instances.
Please see TEC1434589 Discussion of Archive and Purge configuration for more details on the archive and purge configuration.