The MDEX Engine request log is subject to log rotation when it goes over one gigabyte. You can issue the admin?op=logroll command to force a rotation.

When the request log rotates, the existing logfile is renamed from, say, dgraph.reqlog to dgraph.reqlog.PID.N, where:

To force a log roll, issue the following command:

http://<host>:<port>/admin?op=logroll

To roll the MDEX Engine log on a fixed schedule, you can create a Windows Scheduler task on Windows or a Cron job on UNIX to issue the admin?op=logroll command.