How to manage DataModel acceleration storage (tstatsHomePath) ?

Is there a way to manage the storage limits on the tstatsHomePath for an index that is using Data Model acceleration ?

I've installed the latest version of the Splunk for PaloAlto Networks that uses Splunk 6 DataModels instead of the TSCollect technique (which btw had the same problem) and right now I have 100GB in the datamodel_summary folder (and growing fast).