EXC Availability Service Average Time to Process a Free Busy Request Rule fires excessive alarms. The same Performance counter does not show excessive value when monitored via Perfmon
Per the document of Microsoft, the counter of “MSExchange Availability Service\Average Time to Process a Free Busy Request” should be less than 5 at all times.
That agent runs WMI query
select AverageTimetoProcessaFreeBusyRequest, AverageTimetoProcessaFreeBusyRequest_Base, Frequency_PerfTime from Win32_PerfRawData_MSExchangeAvailabilityService_MSExchangeAvailabilityService
The counter type of AverageTimetoProcessaFreeBusyRequest is PERF_AVERAGE_TIMER (805438464) and corresponding calculate formula is ((N1 - N0) / F) / (D1 - D0).
N1 – current AverageTimetoProcessaFreeBusyRequest
N0 – previous AverageTimetoProcessaFreeBusyRequest previous value
D1 – current AverageTimetoProcessaFreeBusyRequest_Base
D0 –previous AverageTimetoProcessaFreeBusyRequest_Base
F - Frequency_PerfTime
For each performance counter, there is a maximum value: PERF_MAX.If the counter exceeds the max value, it will be reset. In cases where the counter value increases very quickly,our agent gets an abnormally high value and fires an alarm
Defect ID EXC-681 has been logged and will be evaluated for a future Release.
Workaround:
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