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MSSQL 2016: Average length of the row chains in the hash buckets monitor type

Microsoft.SQLServer.2016.Monitoring.HashIndexAvgChainLength.MonitorType (UnitMonitorType)

Average length of the row chains in the hash buckets monitor type

Element properties:

RunAsMicrosoft.SQLServer.MonitoringAccount
AccessibilityInternal
Support Monitor RecalculateFalse

Member Modules:

ID Module Type TypeId RunAs 
DS DataSource Microsoft.SQLServer.2016.Monitoring.HashIndexAvgChainLength.DataSource Default
DatabaseFilter ConditionDetection System.ExpressionFilter Default
HealthState ConditionDetection System.ExpressionFilter Default
WarningState ConditionDetection System.ExpressionFilter Default

Overrideable Parameters:

IDParameterTypeSelectorDisplay NameDescription
IntervalSecondsint$Config/IntervalSeconds$Interval (seconds)The recurring interval of time in seconds in which to run the workflow.
TimeoutSecondsint$Config/TimeoutSeconds$Timeout (seconds)Specifies the time the workflow is allowed to run before being closed and marked as failed.
SyncTimestring$Config/SyncTime$Synchronization TimeThe synchronization time specified by using a 24-hour format. May be omitted.
EmptyBucketPercentThresholdint$Config/EmptyBucketPercentThreshold$Empty Bucket Percent ThresholdThreshold for Empty Bucket Percent that indicates the number of empty buckets in the hash index.
AvgChainLengthThresholdint$Config/AvgChainLengthThreshold$Average Chain Length ThresholdThreshold for Average Chain Length that indicates the average length of the row chains in the hash buckets.
ErrorTopLinesint$Config/ErrorTopLines$Display index countThe display count of not configured indexes according to the best practice.

Source Code:

<UnitMonitorType ID="Microsoft.SQLServer.2016.Monitoring.HashIndexAvgChainLength.MonitorType" Accessibility="Internal" RunAs="GPMP!Microsoft.SQLServer.MonitoringAccount">

  <MonitorTypeStates>

    <MonitorTypeState ID="Health"/>

    <MonitorTypeState ID="Warning"/>

  </MonitorTypeStates>

  <Configuration>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="ComputerName" type="xsd:string"/>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="SqlInstanceName" type="xsd:string"/>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="ConnectionString" type="xsd:string"/>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="ServiceName" type="xsd:string"/>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="DatabaseName" type="xsd:string"/>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="IntervalSeconds" type="xsd:integer"/>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="TimeoutSeconds" type="xsd:integer"/>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="SyncTime" type="xsd:string"/>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="EmptyBucketPercentThreshold" type="xsd:integer"/>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="AvgChainLengthThreshold" type="xsd:integer"/>

    <xsd:element xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="ErrorTopLines" type="xsd:integer"/>

  </Configuration>

  <OverrideableParameters>

    <OverrideableParameter ID="IntervalSeconds" Selector="$Config/IntervalSeconds$" ParameterType="int"/>

    <OverrideableParameter ID="TimeoutSeconds" Selector="$Config/TimeoutSeconds$" ParameterType="int"/>

    <OverrideableParameter ID="SyncTime" Selector="$Config/SyncTime$" ParameterType="string"/>

    <OverrideableParameter ID="EmptyBucketPercentThreshold" Selector="$Config/EmptyBucketPercentThreshold$" ParameterType="int"/>

    <OverrideableParameter ID="AvgChainLengthThreshold" Selector="$Config/AvgChainLengthThreshold$" ParameterType="int"/>

    <OverrideableParameter ID="ErrorTopLines" Selector="$Config/ErrorTopLines$" ParameterType="int"/>

  </OverrideableParameters>

  <MonitorImplementation>

    <MemberModules>

      <DataSource ID="DS" TypeID="Microsoft.SQLServer.2016.Monitoring.HashIndexAvgChainLength.DataSource">

        <IntervalSeconds>$Config/IntervalSeconds$</IntervalSeconds>

        <TimeoutSeconds>$Config/TimeoutSeconds$</TimeoutSeconds>

        <SyncTime>$Config/SyncTime$</SyncTime>

        <ComputerName>$Config/ComputerName$</ComputerName>

        <SqlInstanceName>$Config/SqlInstanceName$</SqlInstanceName>

        <ConnectionString>$Config/ConnectionString$</ConnectionString>

        <ServiceName>$Config/ServiceName$</ServiceName>

        <EmptyBucketPercentThreshold>$Config/EmptyBucketPercentThreshold$</EmptyBucketPercentThreshold>

        <AvgChainLengthThreshold>$Config/AvgChainLengthThreshold$</AvgChainLengthThreshold>

        <ErrorTopLines>$Config/ErrorTopLines$</ErrorTopLines>

      </DataSource>

      <ConditionDetection ID="HealthState" TypeID="System!System.ExpressionFilter">

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Property[@Name='Status']</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">Health</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </ConditionDetection>

      <ConditionDetection ID="WarningState" TypeID="System!System.ExpressionFilter">

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Property[@Name='Status']</XPathQuery>

            </ValueExpression>

            <Operator>NotEqual</Operator>

            <ValueExpression>

              <Value Type="String">Health</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </ConditionDetection>

      <ConditionDetection ID="DatabaseFilter" TypeID="System!System.ExpressionFilter">

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Property[@Name='DatabaseName']</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">$Config/DatabaseName$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </ConditionDetection>

    </MemberModules>

    <RegularDetections>

      <RegularDetection MonitorTypeStateID="Health">

        <Node ID="HealthState">

          <Node ID="DatabaseFilter">

            <Node ID="DS"/>

          </Node>

        </Node>

      </RegularDetection>

      <RegularDetection MonitorTypeStateID="Warning">

        <Node ID="WarningState">

          <Node ID="DatabaseFilter">

            <Node ID="DS"/>

          </Node>

        </Node>

      </RegularDetection>

    </RegularDetections>

  </MonitorImplementation>

</UnitMonitorType>