/admin/datadomain?op=stats returns the Dgraph Statistics page.
The Dgraph Statistics page provides a detailed breakdown of what the Dgraph process is doing, and is a useful source of information about your Endeca implementation’s configuration and performance. It provides information such as startup time, last data files creation time, and path. This lets you focus your tuning and load-balancing efforts. By examining this page, you can see where the Dgraph is spending its time.