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FarmOU is Too Large

Microsoft.OfficeWebAppsServer_Custom.FarmOUIsTooLarge (UnitMonitor)

The OU being used for the farm is too large. Performance of the farm slows down significantly as the OU grows beyond 1000 items.

Knowledge Base article:

Summary

To get the most current Knowledge Article from the Microsoft TechNet site, visit:

http://go.microsoft.com/fwlink/p/?LinkId=258812

Causes

View all current alerts from this object using this link:

View Alerts

Element properties:

TargetMicrosoft.OfficeWebAppsServer_Custom.Machine
Parent MonitorSystem.Health.EntityState
CategoryPerformanceHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityWarning
Alert PriorityLow
Alert Auto ResolveTrue
Monitor TypeMicrosoft.Windows.RepeatedEventLogManualReset2StateMonitorType
RemotableTrue
AccessibilityPublic
Alert Message
Farm OU is Too Large
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.OfficeWebAppsServer_Custom.FarmOUIsTooLarge" Accessibility="Public" Enabled="onEssentialMonitoring" Target="Microsoft.OfficeWebAppsServer_Custom.Machine" ParentMonitorID="Health!System.Health.EntityState" Remotable="true" Priority="Low" TypeID="Windows!Microsoft.Windows.RepeatedEventLogManualReset2StateMonitorType" ConfirmDelivery="false">

  <Category>PerformanceHealth</Category>

  <AlertSettings AlertMessage="Microsoft.OfficeWebAppsServer_Custom.FarmOUIsTooLarge_AlertMessageResourceID">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Low</AlertPriority>

    <AlertSeverity>Warning</AlertSeverity>

  </AlertSettings>

  <OperationalStates>

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

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

  </OperationalStates>

  <Configuration>

    <RepeatedComputerName>$Target/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</RepeatedComputerName>

    <RepeatedLogName>Microsoft Office Web Apps</RepeatedLogName>

    <RepeatedExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="UnsignedInteger">8117</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">PublisherName</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">Office Web Apps</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </RepeatedExpression>

    <Consolidator>

      <ConsolidationProperties>

        <PropertyXPathQuery>EventCategory</PropertyXPathQuery>

        <PropertyXPathQuery>EventDisplayNumber</PropertyXPathQuery>

      </ConsolidationProperties>

      <TimeControl>

        <WithinTimeSchedule>

          <Interval>15</Interval>

        </WithinTimeSchedule>

      </TimeControl>

      <CountingCondition>

        <Count>5</Count>

        <CountMode>OnNewItemTestOutputRestart_OnTimerRestart</CountMode>

      </CountingCondition>

    </Consolidator>

  </Configuration>

</UnitMonitor>