VMware VirtualCenter: ESX datastore write latency Health Monitor

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

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

Knowledge Base article:

Summary

ESX datastore write latency is over threshold.

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

Causes

The amount of write operations has been increased or the available datastore space is not enough to handle all write operations.

Resolutions

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

Additional

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

Element properties:

Target

Jalasoft.Xian.Common.Elements.ThirdParty.VMWare.JsXVMwareVirtualCenterDatastoreEsxElement

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

ESX datastore write latency Alert

{0}

Source Code:

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

  <Category>StateCollection</Category>

  <AlertSettings AlertMessage="EsxDatastoreTotalWriteLatency_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>