How to control what the DDC caches

Been looking for more information on the DDC, but seems very sparse thus far. My question is, when I run the fill command, the DDC becomes super massive. I assume what this command is doing is caching all the derived data needed for all assets in the content folder for all platforms the engine supports? What if I only care about certain platforms? Is there a way to specify which platforms are cached in the DDC? Really cant afford to spend resources compiling out and using up space for data I don’t need.

I have figured out that the platforms the project supports are configurable and disabling them appears to affect what is cached.