diff --git a/src/leveled_cdb.erl b/src/leveled_cdb.erl
index 8360a7f..a24feb4 100644
--- a/src/leveled_cdb.erl
+++ b/src/leveled_cdb.erl
@@ -58,7 +58,8 @@
                 {gen_fsm, sync_send_event, 2},
                 {gen_fsm, send_event, 2},
                 {gen_fsm, sync_send_all_state_event, 3},
-                {gen_fsm, send_all_state_event, 2}]}).
+                {gen_fsm, send_all_state_event, 2},
+                {gen_fsm, reply, 2}]}).
 -endif.
 
 -ifdef(slow_test).
@@ -441,7 +442,7 @@ starting({open_writer, Filename}, _From, State) ->
                             last_position=LastPosition,
                             last_key=LastKey,
                             filename=Filename,
-                            hashtree=HashTree}
+                            hashtree=HashTree},
     {reply, ok, writer, State0, hibernate};
 starting({open_reader, Filename}, _From, State) ->
     leveled_log:save(State#state.log_options),
@@ -450,7 +451,7 @@ starting({open_reader, Filename}, _From, State) ->
     State0 = State#state{handle=Handle,
                             last_key=LastKey,
                             filename=Filename,
-                            hash_index=Index}
+                            hash_index=Index},
     {reply, ok, reader, State0, hibernate};
 starting({open_reader, Filename, LastKey}, _From, State) ->
     leveled_log:save(State#state.log_options),
@@ -459,7 +460,7 @@ starting({open_reader, Filename, LastKey}, _From, State) ->
     State0 = State#state{handle=Handle,
                             last_key=LastKey,
                             filename=Filename,
-                            hash_index=Index}
+                            hash_index=Index},
     {reply, ok, reader, State0, hibernate}.
 
 writer({get_kv, Key}, _From, State) ->
diff --git a/src/leveled_sst.erl b/src/leveled_sst.erl
index c5768cf..512c289 100644
--- a/src/leveled_sst.erl
+++ b/src/leveled_sst.erl
@@ -717,8 +717,7 @@ reader(close, _From, State) ->
     {stop, normal, ok, State}.
 
 reader({switch_levels, NewLevel}, State) ->
-    erlang:garbage_collect(self()),
-    {next_state, reader, State#state{level = NewLevel}}.
+    {next_state, reader, State#state{level = NewLevel}, hibernate}.
 
 
 delete_pending({get_kv, LedgerKey, Hash}, _From, State) ->
@@ -792,8 +791,7 @@ handle_info(tidyup_after_startup, delete_pending, State) ->
 handle_info(tidyup_after_startup, StateName, State) ->
     case is_process_alive(State#state.starting_pid) of
         true ->
-            erlang:garbage_collect(self()),
-            {next_state, StateName, State};
+            {next_state, StateName, State, hibernate};
         false ->
             {stop, normal, State}
     end.