Tested with metrics-cassandra:v3.6.173.0.105-1, unlogged_batch_across_partitions_warn_threshold is set to 30 now, sanity testing is passed. Set it to VERIFIED.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:2007