System Center 2012 Virtual Machine Manager Host Memory Utilization

Microsoft.SystemCenter.VirtualMachineManager.2012.HostMemoryUtilizationMonitor (UnitMonitor)

Monitors the host memory utilization

Knowledge Base article:

Summary

This monitor tracks how much memory on the host is being used, in megabytes. The available memory for the host is less than the threshold.

Causes

The virtual machines running on the host are consuming critical levels of host memory.

Resolutions

To free additional host memory, migrate a virtual machine to another host. To have Virtual Machine Manager automatically load-balance host clusters, enable the dynamic optimization feature. For information about dynamic optimization, see the Virtual Machine Manager documentation.

Element properties:

Target

Microsoft.SystemCenter.VirtualMachineManager.2012.HyperVHost

Parent Monitor

System.Health.AvailabilityState

Category

AvailabilityHealth

Enabled

True

Alert Generate

True

Alert Severity

MatchMonitorHealth

Alert Priority

Normal

Alert Auto Resolve

True

Monitor Type

Microsoft.SystemCenter.VirtualMachineManager.2012.Performance.ScriptBasedConsecutiveSamplesTwoThresholdsMonitorType

Remotable

True

Accessibility

Public

Alert Message

Host Memory Utilization is high

Host memory utilization is {1} and has exceeded the warning or critical levels for {0}

RunAs

Default

Source Code:

<UnitMonitor ID="Microsoft.SystemCenter.VirtualMachineManager.2012.HostMemoryUtilizationMonitor" Accessibility="Public" Target="VMM2012Discovery!Microsoft.SystemCenter.VirtualMachineManager.2012.HyperVHost" ParentMonitorID="SystemHealth!System.Health.AvailabilityState" Remotable="true" TypeID="Microsoft.SystemCenter.VirtualMachineManager.2012.Performance.ScriptBasedConsecutiveSamplesTwoThresholdsMonitorType">

  <Category>AvailabilityHealth</Category>

  <AlertSettings AlertMessage="Microsoft.SystemCenter.VirtualMachineManager.2012.HostMemoryUtilizationMonitor.AlertMessage">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>MatchMonitorHealth</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Target/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</AlertParameter1>

      <AlertParameter2>$Data/Context/SampleValue$</AlertParameter2>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="MemoryUtilizationReachedWarning" MonitorTypeStateID="ConditionWarn" HealthState="Warning"/>

    <OperationalState ID="MemoryUtilizationReachedError" MonitorTypeStateID="ConditionError" HealthState="Error"/>

    <OperationalState ID="MemoryUtilizationIsSuccess" MonitorTypeStateID="ConditionSuccess" HealthState="Success"/>

  </OperationalStates>

  <Configuration>

    <IntervalSeconds>180</IntervalSeconds>

    <TimeoutSeconds>180</TimeoutSeconds>

    <WarningThreshold>80</WarningThreshold>

    <CriticalThreshold>90</CriticalThreshold>

    <NumSamples>3</NumSamples>

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

    <ScriptBody><Script>

' Copyright (c) Microsoft Corporation. All rights reserved.

' VBScript source code

' HostMemoryUtilizationCounter.vbs

Option Explicit



SetLocale("en-us")



' This Script is used to check the Host memory utilization

' Alert when the utilization of this partition is high:

' Warning: WarningThreshold%, like 80%

' Critical: CriticalThreshold, like 90%

Dim oArgs, hostComputerName, objWMIService, colItems, objItem, performanceUtilization

Dim oAPI, oBag



Set oAPI = CreateObject("MOM.ScriptAPI")

Set oArgs = Wscript.Arguments



' Check to see if the required script arguments are there

' 1 argument is requried

' If 1 argument does not exist, log a script event

If oArgs.Count = 1 Then

    hostComputerName = oArgs(0)

    Set oBag = oAPI.CreatePropertyBag()

    Set objWMIService = GetObject("winmgmts:\\" &amp; hostComputerName &amp; "\root\CIMV2")



    Set colItems = objWMIService.ExecQuery("Select * from Win32_OperatingSystem")                                

    for each objItem in colItems

       If objItem.TotalVisibleMemorySize &gt; 0 Then

         performanceUtilization = ((objItem.TotalVisibleMemorySize - objItem.FreePhysicalMemory)/objItem.TotalVisibleMemorySize)*100

       End If

    Next

    

    if performanceUtilization &lt; 0 then

       performanceUtilization = 0

    end if

  

    performanceUtilization = CInt(performanceUtilization)

    

    Call oBag.AddValue("Utilization", performanceUtilization)

    Call oAPI.LogScriptEvent("HostMemoryUtilizationCounter.vbs", 103, 0, "HostMemoryUtilizationCounter is " &amp; performanceUtilization)



    Call oAPI.Return(oBag)

Else 

    Call oAPI.LogScriptEvent("HostMemoryUtilizationCounter.vbs", 101, 0, "HostMemoryUtilizationCounter was not called with 1 argument and was not executed.")

End If                            

                        </Script></ScriptBody>

    <ObjectName>win32_PerfFormattedData_Perfos_Memory</ObjectName>

    <CounterName>PercentCommittedBytesInUse</CounterName>

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

    <Value>$Data/Property[@Name='Utilization']$</Value>

  </Configuration>

</UnitMonitor>