In the settings you can set the PARALLEL processes. This sets the maximum amount of concurrent processes in your database.

A higher number generally increases performance but can also give a higher load on your database.

In some circumstances you might want to lower or to raise this setting.

Do Subset and Privacy recognize a change in this setting while a run is busy processing? 


Yes, you can. Subset and Privacy check for this parallel value during every step in the subsetting/masking process. 

Running processes will continue, but new processes will follow the new setting. So if the setting is 8 and you lower the number then the current (max) 8 processes will still continue. After these processes have finished, the new setting is applied.