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CPU Utilization (\%)

Microsoft.SQLServer.Windows.Monitor.DBEngine.CPUUtilization (UnitMonitor)

CPU Utilization (\%) for MSSQL DB Engine. Note: there is a known issue with the CPU Utilization performance monitor, which can sometimes display values greater than 100.

Knowledge Base article:

Summary

The monitor provides measuring of time that processors actually spent working on SQL Server’s process threads. Note that the running interval of the monitor must not be less than 60 seconds and divisible by 60. Otherwise, the returned data will be inexact.

Causes

All allocated CPUs are busy by processing SQL Server tasks.

Resolutions

Evaluate why SQL Server is using a high percentage of CPU using performance monitor SQL Server counters and performance related DMVs such as sys.dm_exec_query_stats.

Sometimes the CPU Utilization performance monitor may show values greater than 100 due to a known issue in the 'sys.dm_os_ring_buffers' dynamic management view used by the monitor to get the utilization value.

External

Troubleshooting Performance Problems in SQL Server

Create an Extended Events Session

Overridable Parameters

Name

Description

Default Value

Alert Priority

Defines Alert Priority.

Normal

Alert Severity

Defines Alert Severity.

Error

Enabled

Enables or disables the workflow.

Yes

Generates Alerts

Defines whether the workflow generates an Alert.

Yes

Interval (seconds)

The recurring interval of time in seconds in which to run the workflow.

300

Number of samples

Indicates how many times a measured value should breach a threshold before the state is changed.

6

Synchronization Time

The synchronization time specified by using a 24-hour format. May be omitted.

 

Threshold

The collected value will be compared against this parameter.

90

Timeout (seconds)

Specifies the time the workflow is allowed to run before being closed and marked as failed.

200

Timeout for query execution (seconds)

The workflow will fail and register an event, if the query execution takes longer than the specified period.

60

Timeout for database connection (seconds)

The workflow will fail and register an event, if it cannot access the database during the specified period.

15

Element properties:

TargetMicrosoft.SQLServer.Windows.DBEngine
Parent MonitorSystem.Health.PerformanceState
CategoryPerformanceHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeMicrosoft.SQLServer.Windows.MonitorType.DBEngine.CPUUtilization
RemotableTrue
AccessibilityPublic
Alert Message
MSSQL on Windows: CPU Utilization (\%) is too high
The CPU utilization level on SQL Server instance "{1}", computer "{0}" is too high. See the "Alert Context" tab for more details.
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.SQLServer.Windows.Monitor.DBEngine.CPUUtilization" Accessibility="Public" Enabled="true" Target="SqlDiscW!Microsoft.SQLServer.Windows.DBEngine" ParentMonitorID="Health!System.Health.PerformanceState" Remotable="true" Priority="Normal" TypeID="Microsoft.SQLServer.Windows.MonitorType.DBEngine.CPUUtilization" ConfirmDelivery="false">

  <Category>PerformanceHealth</Category>

  <AlertSettings AlertMessage="Microsoft.SQLServer.Windows.Monitor.DBEngine.CPUUtilization.AlertMessage">

    <AlertOnState>Error</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>Error</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/MachineName$</AlertParameter1>

      <AlertParameter2>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/InstanceName$</AlertParameter2>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

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

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

  </OperationalStates>

  <Configuration>

    <MachineName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/MachineName$</MachineName>

    <NetbiosComputerName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/NetbiosComputerName$</NetbiosComputerName>

    <InstanceName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/InstanceName$</InstanceName>

    <ConnectionString>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/ConnectionString$</ConnectionString>

    <InstanceVersion>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/Version$</InstanceVersion>

    <InstanceEdition>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/Edition$</InstanceEdition>

    <MonitoringType>$Target/Property[Type="SqlDiscW!Microsoft.SQLServer.Windows.DBEngine"]/MonitoringType$</MonitoringType>

    <Threshold>90</Threshold>

    <NumSamples>6</NumSamples>

    <SqlExecTimeoutSeconds>60</SqlExecTimeoutSeconds>

    <SqlTimeoutSeconds>15</SqlTimeoutSeconds>

    <TimeoutSeconds>200</TimeoutSeconds>

    <IntervalSeconds>300</IntervalSeconds>

    <SyncTime/>

  </Configuration>

</UnitMonitor>