@magentarepeater In the past, these sorts of file bloats have been caused by transactions issues in Badger (Dgraph’s underlying store). In your case, I’m assuming the increase over time occurs when the graph is being mutated. Can you share how you’re accomplishing that, in other words what language and SDK/API are you using?
In the meantime, if you normally schedule downtime of your cluster (backups, etc), you might consider trying the badger flatten command on your datadir