When riak_core_metadata_manager starts up it loads all dets files into ets in its init function, blocking the startup of the process. This should instead be done asynchronously. Reads will need to take into account that the data may not be in memory yet.
In addition, it would be good to explore doing the load in parallel (w/ some batch size)
marked as 2.0.1 since this is an incremental improvement I'd like to get in during a patch release.