Hey @f7b5!
Have you already read the documentation about how to manage and optimize usage for Data Cache? That has some info about what what counts toward usage and how changes to your app can affect that metric.
You can get more details about which projects and paths are using the most by checking the Data Cache section of the Usage tab on your team’s dashboard.
If neither of those resources get you the info you need, please let me know so I can help get you the resources you need.