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Apache HTTP Server Used KBytes Memory

Microsoft.ApacheHTTPServer.ManagedServer.Unix.TotalUsedMemoryKB.Monitor (UnitMonitor)

This monitor generates an alert if the sum of Kilobytes of memory used by the Apache HTTPD Server processes exceed the threshold.

Knowledge Base article:

Summary

The total memory used by the Apache HTTP Server processes is high. System performance may be adversely affected.

Total used memory is the sum of physical memory used by all Apache HTTP Server processes. This metric is the primary indicator of Apache HTTP Server memory consumption.

The monitor threshold is analyzed against an average of values returned in polls to the agent where the Number of Samples parameter controls the number of samples included in the calculation of the average.

Resolutions

To address high Apache HTTP Server memory usage choose one or more of the following options:

Configuration

Default Configuration

Parameter

Default Value

Warning Threshold

262144

Error Threshold

524288

Number of Samples

2

Overrides can be used to change the parameter values defined above for all instances or for specific instances or groups.

Element properties:

TargetMicrosoft.ApacheHTTPServer.ManagedServer.Unix
Parent MonitorSystem.Health.PerformanceState
CategoryPerformanceHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityMatchMonitorHealth
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeMicrosoft.Oss.WSMan.Process.Performance.Average.Threshold.MonitorType
RemotableTrue
AccessibilityPublic
Alert Message
Apache HTTP Server Total Used Memory KBytes
The total Kilobytes of memory ({0} KB) used by the Apache HTTP Server processes is high
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.ApacheHTTPServer.ManagedServer.Unix.TotalUsedMemoryKB.Monitor" Accessibility="Public" Target="Microsoft.ApacheHTTPServer.ManagedServer.Unix" TypeID="Oss!Microsoft.Oss.WSMan.Process.Performance.Average.Threshold.MonitorType" ParentMonitorID="Health!System.Health.PerformanceState" Enabled="onStandardMonitoring">

  <Category>PerformanceHealth</Category>

  <AlertSettings AlertMessage="Microsoft.ApacheHTTPServer.ManagedServer.Unix.TotalUsedMemoryKB.AlertMessage">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>MatchMonitorHealth</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Data/Context/Value$</AlertParameter1>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

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

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

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

  </OperationalStates>

  <Configuration>

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

    <ProcessName>$Target/Property[Type="Microsoft.ApacheHTTPServer.Installation"]/ProcessName$</ProcessName>

    <ArgumentsFilterExpression/>

    <Interval>300</Interval>

    <ObjectName>Apache HTTP Server</ObjectName>

    <CounterName>Used Memory Kbytes</CounterName>

    <InstanceName>$Target/Property[Type="Microsoft.ApacheHTTPServer.Installation"]/ProcessName$</InstanceName>

    <PropertyName>TotalUsedMemory</PropertyName>

    <WarningThreshold>262144</WarningThreshold>

    <ErrorThreshold>524288</ErrorThreshold>

    <NumSamples>2</NumSamples>

  </Configuration>

</UnitMonitor>