5mb requirement is primarily for initial and/or new user db sync to make sure all data is synced/replicated properly across the nodes/cluster. a
5mb addresses the need for initial user db sync to be successful and within reasonable time.
HTH
Doy...
normally provided when you purchase UCM license for upgrades/new installs. shipped or emailedsee James' link here: How is PCD shipped to partner/customer ?HTHDoys K.