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MSSQL 2008: Blocked Session Provider

Microsoft.SQLServer.2008.DBEngine.BlockedSPIDs (UnitMonitorType)

Element properties:

RunAsDefault
AccessibilityInternal
Support Monitor RecalculateFalse

Member Modules:

ID Module Type TypeId RunAs 
DS DataSource Microsoft.SQLServer.2008.BlockingSPIDsProvider Default
FilterBad ConditionDetection System.ExpressionFilter Default
FilterGood 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.
SyncTimestring$Config/SyncTime$Synchronization TimeThe synchronization time specified by using a 24-hour format. May be omitted.
WaitMinutesint$Config/WaitMinutes$Wait Time (minutes)The minimum process execution duration before considering it for Blocked SPIDs analysis.
NumberBlockedSPIDsint$Config/NumberBlockedSPIDs$Number of blocked sessionsNumber of blocked sessions.
TimeoutSecondsint$Config/TimeoutSeconds$Timeout (seconds)Specifies the time the workflow is allowed to run before being closed and marked as failed.

Source Code:

<UnitMonitorType ID="Microsoft.SQLServer.2008.DBEngine.BlockedSPIDs" Accessibility="Internal">

  <MonitorTypeStates>

    <MonitorTypeState ID="Blocked"/>

    <MonitorTypeState ID="NotBlocked"/>

  </MonitorTypeStates>

  <Configuration>

    <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="IntervalSeconds" type="xsd:int"/>

    <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="WaitMinutes" type="xsd:int"/>

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

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

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

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

  </Configuration>

  <OverrideableParameters>

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

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

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

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

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

  </OverrideableParameters>

  <MonitorImplementation>

    <MemberModules>

      <DataSource TypeID="Microsoft.SQLServer.2008.BlockingSPIDsProvider" ID="DS">

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

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

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

        <WaitMinutes>$Config/WaitMinutes$</WaitMinutes>

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

        <InstanceName>$Config/InstanceName$</InstanceName>

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

      </DataSource>

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

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="Integer">Property[@Name='BlockedSPIDCount']</XPathQuery>

            </ValueExpression>

            <Operator>GreaterEqual</Operator>

            <ValueExpression>

              <Value Type="Integer">$Config/NumberBlockedSPIDs$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </ConditionDetection>

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

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="Integer">Property[@Name='BlockedSPIDCount']</XPathQuery>

            </ValueExpression>

            <Operator>Less</Operator>

            <ValueExpression>

              <Value Type="Integer">$Config/NumberBlockedSPIDs$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </ConditionDetection>

    </MemberModules>

    <RegularDetections>

      <RegularDetection MonitorTypeStateID="Blocked">

        <Node ID="FilterGood">

          <Node ID="DS"/>

        </Node>

      </RegularDetection>

      <RegularDetection MonitorTypeStateID="NotBlocked">

        <Node ID="FilterBad">

          <Node ID="DS"/>

        </Node>

      </RegularDetection>

    </RegularDetections>

  </MonitorImplementation>

</UnitMonitorType>