Clustered Data ONTAP: Node Latency (ms) Monitor

DataONTAP.Cluster.NodeVserver.LatencyMonitor (UnitMonitor)

The Node Latency (ms) Monitor monitors the value of the Node I/O counter collected by the Node Performance Statistics Collection Rule.

Knowledge Base article:

Summary

The Node Latency (ms) Monitor monitors the value of the Node I/O counter collected by the Node Performance Statistics Collection Rule:

Counter Name: Node I/O

Instance Name: Node Average Total Latency (ms)

Configuration

Two overrides are available for this monitor. Threshold and number of samples trigger an alert when the value of the performance counter is greater than the threshold for the specified number of consecutive samples. The alert is autoresolved when the underlying condition is resolved.

The default threshold is 50 ms.

The default number of samples is 4.

Resolutions

Inspect the contents of the alert to determine its cause.

Element properties:

TargetDataONTAP.Cluster.NodeVserver
Parent MonitorSystem.Health.PerformanceState
CategoryPerformanceHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityMatchMonitorHealth
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeDataONTAP.Cluster.MonitorType.ConsecutiveSamplesThreshold
RemotableTrue
AccessibilityPublic
Alert Message
Clustered Data ONTAP: Node Latency Monitor
Average total latency {2} ms on Node {0} exceeded configured threshold.
RunAsDefault

Source Code:

<UnitMonitor ID="DataONTAP.Cluster.NodeVserver.LatencyMonitor" Accessibility="Public" Enabled="true" Target="DataONTAP.Cluster.NodeVserver" ParentMonitorID="Health!System.Health.PerformanceState" Remotable="true" Priority="Normal" TypeID="DataONTAP.Cluster.MonitorType.ConsecutiveSamplesThreshold" ConfirmDelivery="true">
<Category>PerformanceHealth</Category>
<AlertSettings AlertMessage="DataONTAP.Cluster.NodeVserver.LatencyMonitor.AlertMessage">
<AlertOnState>Error</AlertOnState>
<AutoResolve>true</AutoResolve>
<AlertPriority>Normal</AlertPriority>
<AlertSeverity>MatchMonitorHealth</AlertSeverity>
<AlertParameters>
<AlertParameter1>$Target/Property[Type="DataONTAP.Cluster.AbstractVserver"]/AbstractVserverName$</AlertParameter1>
<AlertParameter2>null</AlertParameter2>
<AlertParameter3>$Data/Context/DataItem/Property[@Name='SampleValue']$</AlertParameter3>
</AlertParameters>
</AlertSettings>
<OperationalStates>
<OperationalState ID="ConditionTrue" MonitorTypeStateID="ConditionTrue" HealthState="Error"/>
<OperationalState ID="ConditionFalse" MonitorTypeStateID="ConditionFalse" HealthState="Success"/>
</OperationalStates>
<Configuration>
<ObjectID>$Target/Property[Type="DataONTAP.Cluster.AbstractVserver"]/UUID$</ObjectID>
<CounterName>Node I/O</CounterName>
<ObjectName>Clustered Data ONTAP: Node</ObjectName>
<InstanceName>Node Average Total Latency (ms)</InstanceName>
<Threshold>50</Threshold>
<NumSamples>4</NumSamples>
<IntervalSeconds>3600</IntervalSeconds>
<SyncTime>00:13</SyncTime>
<TimeoutSeconds>300</TimeoutSeconds>
</Configuration>
</UnitMonitor>