diff --git a/priv/leveled.schema b/priv/leveled.schema
index 7e34253..4498573 100644
--- a/priv/leveled.schema
+++ b/priv/leveled.schema
@@ -41,6 +41,7 @@
   {datatype, atom}
 ]}.
 
+
 %% @doc Compression point
 %% The point at which compression is applied to the Journal (the Ledger is 
 %% always compressed).  Use on_receipt or on_compact.  on_compact is suitable
@@ -51,6 +52,15 @@
   {datatype, atom}
 ]}.
 
+%% @doc Log level
+%% Can be debug, info, warn, error or critical
+%% Set the minimum log level to be used within leveled.  Leveled will log many
+%% lines to allow for stats to be etracted by those using log indexers such as
+%% Splunk
+{mapping, "leveled.log_level", "leveled.log_level", [
+  {default, info},
+  {datatype, atom}
+]}.
 
 %% @doc The approximate size (in bytes) when a Journal file should be rolled.
 %% Normally keep this as around the size of o(100K) objects.  Default is 500MB
diff --git a/src/leveled_bookie.erl b/src/leveled_bookie.erl
index 11a5312..16be8ef 100644
--- a/src/leveled_bookie.erl
+++ b/src/leveled_bookie.erl
@@ -107,7 +107,8 @@
 -define(CACHE_SIZE_JITTER, 25).
 -define(JOURNAL_SIZE_JITTER, 20).
 -define(ABSOLUTEMAX_JOURNALSIZE, 4000000000).
--define(LONG_RUNNING, 80000).
+-define(LONG_RUNNING, 200000).
+    % An individual task taking > 200ms gets a specific log
 -define(COMPRESSION_METHOD, lz4).
 -define(COMPRESSION_POINT, on_receipt).
 -define(LOG_LEVEL, info).
diff --git a/src/leveled_cdb.erl b/src/leveled_cdb.erl
index 8d8dcb0..54817a7 100644
--- a/src/leveled_cdb.erl
+++ b/src/leveled_cdb.erl
@@ -894,7 +894,12 @@ open_active_file(FileName) when is_list(FileName) ->
         {ok, LastPosition} ->
             ok = file:close(Handle);
         {ok, EndPosition} ->
-            leveled_log:log("CDB06", [LastPosition, EndPosition]),
+            case {LastPosition, EndPosition} of
+                {?BASE_POSITION, 0} ->
+                    ok;
+                _ ->
+                    leveled_log:log("CDB06", [LastPosition, EndPosition])
+            end,
             {ok, _LastPosition} = file:position(Handle, LastPosition),
             ok = file:truncate(Handle),
             ok = file:close(Handle)
@@ -1277,7 +1282,13 @@ startup_filter(Key, _ValueAsBin, Position, {Hashtree, _LastKey}, _ExtractFun) ->
 scan_over_file(Handle, Position, FilterFun, Output, LastKey) ->
     case saferead_keyvalue(Handle) of
         false ->
-            leveled_log:log("CDB09", [Position]),
+            case {LastKey, Position} of
+                {empty, ?BASE_POSITION} ->
+                    % Not interesting that we've nothing to read at base
+                    ok;
+                _ ->
+                    leveled_log:log("CDB09", [Position])
+            end,
             % Bring file back to that position
             {ok, Position} = file:position(Handle, {bof, Position}),
             {eof, Output};
@@ -1896,7 +1907,7 @@ dump(FileName) ->
     end,
     NumberOfPairs = lists:foldl(Fn, 0, lists:seq(0,255)) bsr 1,
     io:format("Count of keys in db is ~w~n", [NumberOfPairs]),  
-    {ok, _} = file:position(Handle, {bof, 2048}),
+    {ok, _} = file:position(Handle, {bof, ?BASE_POSITION}),
     Fn1 = fun(_I, Acc) ->
         {KL, VL} = read_next_2_integers(Handle),
         {Key, KB} = safe_read_next_keybin(Handle, KL),
diff --git a/src/leveled_head.erl b/src/leveled_head.erl
index d6ffd4f..b096844 100644
--- a/src/leveled_head.erl
+++ b/src/leveled_head.erl
@@ -85,6 +85,7 @@
 
 
 -export_type([object_tag/0,
+                headonly_tag/0,
                 head/0,
                 object_metadata/0,
                 appdefinable_function_tuple/0]).
diff --git a/src/leveled_log.erl b/src/leveled_log.erl
index 8c0837a..33dafe4 100644
--- a/src/leveled_log.erl
+++ b/src/leveled_log.erl
@@ -60,7 +60,7 @@
     {"B0011",
         {warn, "Call to destroy the store and so all files to be removed"}},
     {"B0013",
-        {warn, "Long running task took ~w microseconds with task of type ~w"}},
+        {warn, "Long running task took ~w microseconds with task_type=~w"}},
     {"B0015",
         {info, "Put timing with sample_count=~w and mem_time=~w ink_time=~w"
                 ++ " with total_object_size=~w"}},
@@ -142,7 +142,8 @@
         {warn, "We're doomed - intention recorded to destroy all files"}},
     {"P0031",
         {info, "Completion of update to levelzero"
-                    ++ " with cache_size=~w status=~w and update_success=~w"}},
+                    ++ " with cache_size=~w level0_due=~w"
+                    ++ " and change_pending=~w"}},
     {"P0032",
         {info, "Fetch head timing with sample_count=~w and level timings of"
                     ++ " foundmem_time=~w found0_time=~w found1_time=~w" 
@@ -207,7 +208,7 @@
     {"PC015",
         {info, "File created"}},
     {"PC016",
-        {info, "Slow fetch from SFT ~w of ~w microseconds at level ~w "
+        {info, "Slow fetch from SFT ~w of ~w us at level ~w "
                     ++ "with result ~w"}},
     {"PC017",
         {info, "Notified clerk of manifest change"}},
@@ -222,18 +223,18 @@
     {"PC022",
         {info, "Storing reference to deletions at ManifestSQN=~w"}},
     {"PM002",
-        {info, "Completed dump of L0 cache to list of size ~w"}},
+        {info, "Completed dump of L0 cache to list of l0cache_size=~w"}},
     
     {"SST01",
-        {info, "SST timing for result ~w is sample ~w total ~w and max ~w"}},
+        {info, "SST timing for result=~w is sample=~w total=~w and max=~w"}},
     {"SST02",
         {error, "False result returned from SST with filename ~s as "
                     ++ "slot ~w has failed crc check"}},
     {"SST03",
-        {info, "Opening SST file with filename ~s slots ~w and"
+        {info, "Opening SST file with filename ~s slot_count=~w and"
                 ++ " max sqn ~w"}},
     {"SST04",
-        {info, "Exit called for reason ~w on filename ~s"}},
+        {debug, "Exit called for reason ~w on filename ~s"}},
     {"SST05",
         {warn, "Rename rogue filename ~s to ~s"}},
     {"SST06",
@@ -359,14 +360,15 @@
     {"CDB05",
         {info, "Closing of filename ~s from state ~w for reason ~w"}},
     {"CDB06",
-        {info, "File to be truncated at last position of ~w with end of "
+        {warn, "File to be truncated at last position of ~w with end of "
                 ++ "file at ~w"}},
     {"CDB07",
         {info, "Hashtree computed"}},
     {"CDB08",
         {info, "Renaming file from ~s to ~s for which existence is ~w"}},
     {"CDB09",
-        {info, "Failure to read Key/Value at Position ~w in scan"}},
+        {info, "Failure to read Key/Value at Position ~w in scan " ++ 
+                "this may be the end of the file"}},
     {"CDB10",
         {info, "CRC check failed due to mismatch"}},
     {"CDB11",
@@ -374,17 +376,17 @@
     {"CDB12",
         {info, "HashTree written"}},
     {"CDB13",
-        {info, "Write options of ~w"}},
+        {debug, "Write options of ~w"}},
     {"CDB14",
         {info, "Microsecond timings for hashtree build of "
-                ++ "to_list ~w sort ~w build ~w"}},
+                ++ "to_list=~w sort=~w build=~w"}},
     {"CDB15",
         {info, "Collision in search for hash ~w"}},
     {"CDB16",
         {info, "CDB scan from start ~w in file with end ~w and last_key ~w"}},
     {"CDB17",
-        {info, "After ~w PUTs total write time is ~w total sync time is ~w "
-                ++ "and max write time is ~w and max sync time is ~w"}},
+        {info, "After ~w PUTs total_write_time=~w total_sync_time=~w "
+                ++ "and max_write_time=~w and max_sync_time=~w"}},
     {"CDB18",
         {info, "Handled return and write of hashtable"}},
     {"CDB19",
@@ -471,9 +473,10 @@ log(LogRef, Subs, SupportedLogLevels) ->
         {LogRef, {LogLevel, LogText}} ->
             case should_i_log(LogLevel, SupportedLogLevels, LogRef) of
                 true ->
-                    io:format(format_time()
-                              ++ " " ++ LogRef ++ " ~w "
-                              ++ LogText ++ "~n",
+                    io:format(format_time() ++ " "
+                                ++ atom_to_list(LogLevel) ++ " "
+                                ++ LogRef ++ " ~w "
+                                ++ LogText ++ "~n",
                               [self()|Subs]);
                 false ->
                     ok
@@ -507,18 +510,21 @@ log_timer(LogRef, Subs, StartTime, SupportedLogLevels) ->
         {LogRef, {LogLevel, LogText}} ->
             case should_i_log(LogLevel, SupportedLogLevels, LogRef) of
                 true ->
-                    MicroS = timer:now_diff(os:timestamp(), StartTime),
-                    {Unit, Time} = case MicroS of
-                                        MicroS when MicroS < 1000 ->
-                                            {"microsec", MicroS};
-                                        MicroS ->
-                                            {"ms", MicroS div 1000}
-                                    end,
-                    io:format(format_time()
-                                    ++ " " ++ LogRef ++ " ~w "
-                                    ++ LogText
-                                    ++ " with time taken ~w " ++ Unit ++ "~n",
-                                [self()|Subs] ++ [Time]);
+                    DurationText =
+                        case timer:now_diff(os:timestamp(), StartTime) of
+                            US when US > 1000 ->
+                                " with us_duration=" ++ integer_to_list(US) ++
+                                " or ms_duration="
+                                ++ integer_to_list(US div 1000);
+                            US ->
+                                " with us_duration=" ++ integer_to_list(US)
+                        end,
+                    io:format(format_time() ++ " "
+                                ++ atom_to_list(LogLevel) ++ " "
+                                ++ LogRef ++ " ~w "
+                                ++ LogText
+                                ++ DurationText ++ "~n",
+                                [self()|Subs]);
                 false ->
                     ok
             end;
diff --git a/src/leveled_penciller.erl b/src/leveled_penciller.erl
index 584974d..463387d 100644
--- a/src/leveled_penciller.erl
+++ b/src/leveled_penciller.erl
@@ -234,7 +234,7 @@
 -define(PROMPT_WAIT_ONL0, 5).
 -define(WORKQUEUE_BACKLOG_TOLERANCE, 4).
 -define(COIN_SIDECOUNT, 5).
--define(SLOW_FETCH, 20000).
+-define(SLOW_FETCH, 100000).
 -define(ITERATOR_SCANWIDTH, 4).
 -define(TIMING_SAMPLECOUNTDOWN, 10000).
 -define(TIMING_SAMPLESIZE, 100).
@@ -693,7 +693,7 @@ handle_call({push_mem, {LedgerTable, PushedIdx, MinSQN, MaxSQN}},
                 State#state{levelzero_pending=L0Pend,
                             levelzero_constructor=L0Constructor}};
         {false, false} ->
-            leveled_log:log("P0018", [ok, false, false]),
+            % leveled_log:log("P0018", [ok, false, false]),
             PushedTree =
                 case is_tuple(LedgerTable) of
                     true ->
@@ -1254,7 +1254,7 @@ archive_files(RootPath, UsedFileList) ->
                                                             -> pcl_state().
 %% @doc
 %% Update the in-memory cache of recent changes for the penciller.  This is 
-%% the level zer at the top of the tree.
+%% the level zero at the top of the tree.
 %% Once the update is made, there needs to be a decision to potentially roll
 %% the level-zero memory to an on-disk level zero sst file.  This can only
 %% happen when the cache has exeeded the size threshold (with some jitter 
@@ -1295,17 +1295,18 @@ update_levelzero(L0Size, {PushedTree, PushedIdx, MinSQN, MaxSQN},
                 end,
             NoPendingManifestChange = not State#state.work_ongoing,
             JitterCheck = RandomFactor or CacheMuchTooBig,
-            case {CacheTooBig, JitterCheck, NoPendingManifestChange} of
-                {true, true, true}  ->
+            Due = CacheTooBig and JitterCheck,
+            case {Due, NoPendingManifestChange} of
+                {true, true}  ->
                     {L0Pend, L0Constructor, none} =
                         maybe_roll_memory(UpdState, false),
-                    leveled_log:log_timer("P0031", [true, true, L0Pend], SW),
+                    LogSubs = [NewL0Size, true, true],
+                    leveled_log:log_timer("P0031", LogSubs, SW),
                     UpdState#state{levelzero_pending=L0Pend,
                                     levelzero_constructor=L0Constructor};
                 _ ->
-                    leveled_log:log_timer("P0031", 
-                                            [CacheTooBig, JitterCheck, false], 
-                                            SW),
+                    LogSubs = [NewL0Size, Due, NoPendingManifestChange],
+                    leveled_log:log_timer("P0031", LogSubs, SW),
                     UpdState
             end
     end.