Use the less onerous version of statistics.

src/riak_kv_wterl_backend.erl

@@ -377,7 +377,7 @@ max_sessions(Config) ->
 establish_utility_cursors(Connection, Table) ->
     case wterl:cursor_open(Connection, Table) of
         {ok, IsEmptyCursor} ->
-            case wterl:cursor_open(Connection, "table:statistics") of
+            case wterl:cursor_open(Connection, "table:statistics", [{statistics_fast, true}]) of
                 {ok, StatusCursor} ->
                     {ok, IsEmptyCursor, StatusCursor};
                 {error, Reason1} ->

src/wterl.erl

@@ -461,6 +461,7 @@ config_to_bin([{Key, Value} | Rest], Acc) ->
      {eviction_target, integer},
      {eviction_trigger, integer},
      {extensions, {list, quoted}},
+     {statistics_fast, bool},
      {force, bool},
      {from, string},
      {hazard_max, integer},