Hi PotterMan Man,
I changed the title of your thread to say Historical Metrics
You can manage the volume of Historical Metrics stored in the SmartStor by either changing the ongoing storage parameters to reduce retention time and/or by immediately pruning the SmartStor.
For further details please see the docops page "Configure and Manage SmartStor Data":
Configure and Manage SmartStor Data - CA Application Performance Management - 10.7 - CA Technologies Documentation
and specifically topics "Configure SmartStor Tiers" and "Use the SmartStor Command-Line Tools"
I hope that information helps
Regards,
Lynn