moving comments from https://github.com/basho/riak_kv/pull/596#discussion_r6211971 here:

I'm fine w/ the quick fix for now. I think we should open an issue as well since the table size does seem related to ring size (number of partitions owned by a single node). May not be that much of a hit vs. calling multiple deletes but since we did the large ring work we should be careful.