datamodel_summary directory in _internaldb - can we delete?

Hi Team, datamodel_summary directory in _internaldb is consuming huge disk space nearly equivalent to hot DB. Can we delete it? From the documents description its understood that it's used for some kind of data acceleration.What will be the impact if I delete this directory from _internaldb? Do this directory used for any inbuilt app/feature? how can we disable it? please advise Splunk version we r using -indexer -6.0.5.1