noahshaw11 commented on code in PR #3985:
URL: https://github.com/apache/couchdb/pull/3985#discussion_r877430718
##########
src/couch/src/couch_debug.erl:
##########
@@ -620,6 +676,90 @@ info_size(InfoKV) ->
{binary, BinInfos} -> lists:sum([S || {_, S, _} <- BinInfos]);
{_, V} -> V
end.
+resource_hoggers(MemoryInfo, InfoKey) ->
+ KeyFun = fun
+ ({_Pid, _Id, undefined}) -> undefined;
+ ({_Pid, Id, DataMap}) -> {Id, [{InfoKey, maps:get(InfoKey, DataMap)}]}
+ end,
+ resource_hoggers(MemoryInfo, InfoKey, KeyFun).
+
+resource_hoggers(MemoryInfo, InfoKey, KeyFun) ->
+ HoggersData = resource_hoggers_data(MemoryInfo, InfoKey, KeyFun),
+ TableSpec = [
+ {50, centre, id},
+ {20, centre, InfoKey}
+ ],
+ print_table(HoggersData, TableSpec).
+
+resource_hoggers_data(MemoryInfo, InfoKey, KeyFun) when is_atom(InfoKey) ->
+ resource_hoggers_data(MemoryInfo, InfoKey, KeyFun, 20).
+
+resource_hoggers_data(MemoryInfo, InfoKey, KeyFun, N) when is_atom(InfoKey)
and is_integer(N) ->
+ SortedTuples = resource_hoggers_data(MemoryInfo, InfoKey, KeyFun,
undefined),
+ {TopN, _} = lists:split(N, SortedTuples),
+ TopN;
+resource_hoggers_data(MemoryInfo, InfoKey, KeyFun, undefined) when
is_atom(InfoKey) ->
+ Tuples = lists:filtermap(
+ fun(Tuple) ->
+ case KeyFun(Tuple) of
+ undefined ->
+ false;
+ Value ->
+ {true, Value}
+ end
+ end,
+ MemoryInfo
+ ),
+ lists:reverse(lists:keysort(2, Tuples)).
+
+resource_hoggers_snapshot({N, MemoryInfo, InfoKeys} = _Snapshot) ->
+ Data = lists:filtermap(
+ fun({Pid, Id, Data}) ->
+ case memory_info(Pid, InfoKeys) of
+ {Pid, undefined, undefined} ->
+ false;
+ {_, _, DataMap} ->
+ {true, {Pid, Id, update_delta(Data, DataMap)}}
+ end
+ end,
+ MemoryInfo
+ ),
+ {N + 1, Data, InfoKeys};
+resource_hoggers_snapshot([]) ->
+ [];
+resource_hoggers_snapshot([{_Pid, _Id, Data} | _] = MemoryInfo) ->
+ resource_hoggers_snapshot({0, MemoryInfo, maps:keys(Data)}).
+
+update_delta({_, InitialDataMap}, DataMap) ->
+ update_delta(InitialDataMap, DataMap);
+update_delta(InitialDataMap, DataMap) ->
+ Delta = maps:fold(
+ fun(Key, Value, AccIn) ->
+ maps:put(Key, maps:get(Key, DataMap, Value) - Value, AccIn)
+ end,
+ maps:new(),
+ InitialDataMap
+ ),
+ {Delta, InitialDataMap}.
+
+analyze_resource_hoggers({N, Data, InfoKeys}, TopN) ->
+ io:format("Number of snapshots: ~p~n", [N]),
+ lists:map(
+ fun(InfoKey) ->
+ KeyFun = fun
+ ({_Pid, _Id, undefined}) -> undefined;
+ ({_Pid, Id, {Delta, _DataMap}}) -> {Id, [{InfoKey,
maps:get(InfoKey, Delta)}]}
Review Comment:
Tested it locally:
```
([email protected])6> couch_debug:analyze_resource_hoggers(RHS, 3).
Number of snapshots: 1
Top 3 by change in binary
| id | binary|
delta
| erl_prim_loader[<0.10.0>] | 34373|
27493
| init[<0.0.0>] | 0|
0
| erts_code_purger[<0.1.0>] | 0|
0
Top 3 by change in dictionary
| id | dictionary|
delta
| erlang:apply/2[<0.1205.0>] | 1|
4
| init[<0.0.0>] | 0|
0
| erts_code_purger[<0.1.0>] | 0|
0
Top 3 by change in heap_size
| id | heap_size|
delta
| erlang:apply/2[<0.1205.0>] | 4185|
192465
| couch_replicator_rate_limiter[<0.517.0>] | 233|
1365
| init[<0.0.0>] | 2586|
0
Top 3 by change in links
| id | links|
delta
| init[<0.0.0>] | 3|
0
| erts_code_purger[<0.1.0>] | 0|
0
| erts_literal_area_collector:start/0[<0.2.0>] | 0|
0
Top 3 by change in memory
| id | memory|
delta
| erlang:apply/2[<0.1205.0>] | 264040|
1311072
| couch_replicator_rate_limiter[<0.517.0>] | 2832|
31608
| folsom_sample_slide_server:init/1[<0.235.0>] | 2752|
3008
Top 3 by change in message_queue_len
| id | message_queue_len|
delta
| init[<0.0.0>] | 0|
0
| erts_code_purger[<0.1.0>] | 0|
0
| erts_literal_area_collector:start/0[<0.2.0>] | 0|
0
Top 3 by change in monitored_by
| id | monitored_by|
delta
| init[<0.0.0>] | 0|
0
| erts_code_purger[<0.1.0>] | 0|
0
| erts_literal_area_collector:start/0[<0.2.0>] | 0|
0
Top 3 by change in monitors
| id | monitors|
delta
| init[<0.0.0>] | 0|
0
| erts_code_purger[<0.1.0>] | 0|
0
| erts_literal_area_collector:start/0[<0.2.0>] | 0|
0
Top 3 by change in stack_size
| id | stack_size|
delta
| init[<0.0.0>] | 3|
0
| erts_code_purger[<0.1.0>] | 2|
0
| erts_literal_area_collector:start/0[<0.2.0>] | 6|
0
Top 3 by change in total_heap_size
| id | total_heap_size|
delta
| erlang:apply/2[<0.1205.0>] | 32875|
163884
| couch_replicator_rate_limiter[<0.517.0>] | 233|
3951
| folsom_sample_slide_server:init/1[<0.235.0>] | 233|
376
```
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
