VMware VirtualCenter: VM datastore read latency Health Monitor

Jalasoft.Xian.SmartManagementPacks.VMwareVirtualCenters.VmDatastoreTotalReadLatency.1.1 (AggregateMonitor)

This rule shows the average amount of time for a read operation from the datastore, which can be represented as: Total Latency = kernel latency + device latency.

Knowledge Base article:

Summary

VM datastore read latency is over threshold.

The average value retrieved to monitor the amount of time for a read operation is over the maximum threshold configured in Xian Network Manager 2012.

Causes

The amount of read operations has been increased due to a high rate demand.

Resolutions

Verify the kernel and device resource in order to improve the read latency.

Additional

This rule shows he average amount of time for a read operation from the datastore, this can be represented as: Total Latency = kernel latency + device latency.

Element properties:

Target

Jalasoft.Xian.Common.Elements.ThirdParty.VMWare.JsXVMwareVirtualCenterDatastoreVmElement

Parent Monitor

System.Health.PerformanceState

Algorithm

WorstOf

Category

StateCollection

Enabled

True

Alert Generate

True

Alert Severity

MatchMonitorHealth

Alert Priority

Low

Alert Auto Resolve

True

Remotable

True

Accessibility

Public

Alert Message

VM datastore read latency Alert

{0}

Source Code:

<AggregateMonitor ID="Jalasoft.Xian.SmartManagementPacks.VMwareVirtualCenters.VmDatastoreTotalReadLatency.1.1" Accessibility="Public" Enabled="true" Target="ThirdParty_VMWare!Jalasoft.Xian.Common.Elements.ThirdParty.VMWare.JsXVMwareVirtualCenterDatastoreVmElement" ParentMonitorID="SystemHealth!System.Health.PerformanceState" Remotable="true" Priority="Normal">

  <Category>StateCollection</Category>

  <AlertSettings AlertMessage="VmDatastoreTotalReadLatency_AlertMessage">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Low</AlertPriority>

    <AlertSeverity>MatchMonitorHealth</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Data/Context/Params/Param[3]$</AlertParameter1>

    </AlertParameters>

  </AlertSettings>

  <Algorithm>WorstOf</Algorithm>

</AggregateMonitor>