Dgraph should auto balance the predicates, I was just thinking maybe that most of your data was all on a single predicate, but that doesn’t appear to be the case. I don’t have any advice on what to try from here. I don’t do server config anymore for Dgrapg to know if there are any other commands you could run to help debug that further.
See jf this helps: Unbalanced disk usage - #3 by dmai
I don’t know who to tag to help more here. Maybe @dmai ?