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ATQ Average Threads Monitor

Microsoft.Windows.Server.2012.AD.Performance.Atq.AvgThreads.Monitor (UnitMonitor)

Monitors the total ATQ threads in use.

Knowledge Base article:

Summary

Asynchronous Thread Queue (ATQ) Average Threads Monitor. The number of ATQ threads in usage is high which could impact throughput of client requests.

There is a fixed number of available threads for servicing requests. The default and recommended configuration is 4 per processor core. If all threads are in use, additional requests will sit in the queue until a thread is available.

Causes

Possible causes include the following:

Resolutions

View the overall system performance of the machine to determine if it needs additional resources.

Add additional domain controllers to help load-balance the load.

Ensure that there are a sufficient number of DCs hosting DNS.

External

Element properties:

TargetMicrosoft.Windows.Server.2012.AD.DomainControllerRole
Parent MonitorMicrosoft.Windows.Server.2012.AD.AtqMonitors.Performance.AggregateMonitor
CategoryCustom
EnabledTrue
Alert GenerateTrue
Alert SeverityMatchMonitorHealth
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeMicrosoft.Windows.Server.2012.AD.Performance.Atq.AvgThreads.Monitor.Monitortype
RemotableFalse
AccessibilityPublic
Alert Message
The total number of ATQ threads in use has exceeded one or more thresholds over multiple samples.
{0}
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.Windows.Server.2012.AD.Performance.Atq.AvgThreads.Monitor" Accessibility="Public" Enabled="true" Target="AD2012Core!Microsoft.Windows.Server.2012.AD.DomainControllerRole" ParentMonitorID="Microsoft.Windows.Server.2012.AD.AtqMonitors.Performance.AggregateMonitor" Remotable="false" Priority="Normal" TypeID="Microsoft.Windows.Server.2012.AD.Performance.Atq.AvgThreads.Monitor.Monitortype" ConfirmDelivery="false">

  <Category>Custom</Category>

  <AlertSettings AlertMessage="Microsoft.Windows.Server.2012.AD.Performance.Atq.AvgThreads.Monitor.AlertMessage">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>MatchMonitorHealth</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Data/Context/Property[@Name='ErrorString']$</AlertParameter1>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="ThreadUsageOK" MonitorTypeStateID="ThreadUsageOK" HealthState="Success"/>

    <OperationalState ID="ThreadUsageWarn" MonitorTypeStateID="ThreadUsageWarn" HealthState="Warning"/>

    <OperationalState ID="ThreadUsageError" MonitorTypeStateID="ThreadUsageError" HealthState="Error"/>

  </OperationalStates>

  <Configuration>

    <Frequency>300</Frequency>

    <TimeoutSeconds>300</TimeoutSeconds>

    <WarnThreshold>80</WarnThreshold>

    <ErrorThreshold>90</ErrorThreshold>

    <NumSamples>10</NumSamples>

    <MaxPoolThreads>4</MaxPoolThreads>

  </Configuration>

</UnitMonitor>