diff options
Diffstat (limited to 'src/mongo/util/perfctr_collect.h')
| -rw-r--r-- | src/mongo/util/perfctr_collect.h | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/src/mongo/util/perfctr_collect.h b/src/mongo/util/perfctr_collect.h index 72c74f9833a..4c29fabd1cc 100644 --- a/src/mongo/util/perfctr_collect.h +++ b/src/mongo/util/perfctr_collect.h @@ -148,11 +148,13 @@ public: static StatusWith<std::unique_ptr<PerfCounterCollector>> create(PerfCounterCollection builder); /** - * Collect the counters from PDH, and output their raw values into builder. + * Collect the counters from PDH, and output their raw values into builder. The exception is + * elapsed time counters which returns computed values instead of raw values. * - * For each counters, if the counter is a delta, rate, or fraction counter, the second value is - * output under the name "<counter> Base". Also, a single field is output called "timebase" if - * any counter depends on system ticks per second. + * For each counters, if the counter is a precision counter (see PERF_COUNTER_PRECISION), the + * second value is output under the name "<counter> Base". Also, a single field is output called + * "timebase" if any counter depends on system ticks per second. See counterHasTickBasedTimeBase + * for more details about timebase. */ Status collect(BSONObjBuilder* builder); @@ -169,14 +171,14 @@ private: std::string firstName; /** - * The name of the second value of a counter if the counter is a delta, rate, or fraction - * counter. This is output as: "\<Object Name>\<Counter Name> Base". + * The name of the second value of a counter if the counter is a precision counter. This is + * output as: "\<Object Name>\<Counter Name> Base". */ std::string secondName; /** - * True if the counter is a delta, rate, or fraction counter, and its value should be output - * in the output BSON document. + * True if the counter is a precision counter, and its value should be output in the output + * BSON document. */ bool hasSecondValue; |