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Randomise logging of GET/HEAD samples

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This commit is contained in:
martinsumner 2016-12-22 17:28:41 +00:00
parent ee534081c3
commit 353fb08e21
1 changed files with 26 additions and 8 deletions
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22
src/leveled_log.erl
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@ -14,8 +14,8 @@
get_timing/3]).
-define(PUT_TIMING_LOGPOINT, 20000).
-define(HEAD_TIMING_LOGPOINT, 100000).
-define(GET_TIMING_LOGPOINT, 50000).
-define(HEAD_TIMING_LOGPOINT, 160000).
-define(GET_TIMING_LOGPOINT, 160000).
-define(LOG_LEVEL, [info, warn, error, critical]).
-define(SAMPLE_RATE, 16#F).
@ -374,9 +374,18 @@ head_timing_int(undefined, T0, Level, R) ->
end end,
{1, lists:foldl(NewDFun, dict:new(), head_keylist())};
head_timing_int({?HEAD_TIMING_LOGPOINT, HeadTimingD}, T0, Level, R) ->
RN = random:uniform(?HEAD_TIMING_LOGPOINT),
case RN > ?HEAD_TIMING_LOGPOINT div 2 of
true ->
% log at the timing point less than half the time
LogFun = fun(K) -> log("P0032", [K|dict:fetch(K, HeadTimingD)]) end,
lists:foreach(LogFun, head_keylist()),
head_timing_int(undefined, T0, Level, R);
false ->
% Log some other time - reset to RN not 0 to stagger logs out over
% time between the vnodes
head_timing_int({RN, HeadTimingD}, T0, Level, R)
end;
head_timing_int({N, HeadTimingD}, T0, Level, R) ->
Key = head_key(R, Level),
[Count0, Total0, Max0] = dict:fetch(Key, HeadTimingD),
@ -423,9 +432,18 @@ get_timing_int(undefined, T0, TimerType) ->
end end,
{1, lists:foldl(NewDFun, dict:new(), get_keylist())};
get_timing_int({?GET_TIMING_LOGPOINT, GetTimerD}, T0, TimerType) ->
RN = random:uniform(?GET_TIMING_LOGPOINT),
case RN > ?GET_TIMING_LOGPOINT div 2 of
true ->
% log at the timing point less than half the time
LogFun = fun(K) -> log("B0014", [K|dict:fetch(K, GetTimerD)]) end,
lists:foreach(LogFun, get_keylist()),
get_timing_int(undefined, T0, TimerType);
false ->
% Log some other time - reset to RN not 0 to stagger logs out over
% time between the vnodes
get_timing_int({RN, GetTimerD}, T0, TimerType)
end;
get_timing_int({N, GetTimerD}, T0, TimerType) ->
[Count0, Total0, Max0] = dict:fetch(TimerType, GetTimerD),
{N + 1,