MSSQL on Linux: DB Engine Page Life Expectancy (in seconds)

Microsoft.SQLServer.Linux.MonitorType.DBEngine.PageLifeExpectancy (UnitMonitorType)

DB Engine Page Life Expectancy (in seconds) monitor type for DBs on Linux

Element properties:

Show References:
- Unit Monitors (1)

RunAs	Microsoft.SQLServer.Core.RunAs.Monitoring
Accessibility	Internal
Support Monitor Recalculate	False

Member Modules:

ID	Module Type	TypeId	RunAs
DS	DataSource	Microsoft.SQLServer.Linux.DataSource.SqlOsPerformanceReader	Default
ErrorCondition	ConditionDetection	System.ExpressionFilter	Default
NormalCondition	ConditionDetection	System.ExpressionFilter	Default

Overrideable Parameters:

ID	ParameterType	Selector	Display Name	Description
IntervalSeconds	int	$Config/IntervalSeconds$	Interval (seconds)	The recurring interval of time in seconds in which to run the workflow.
SyncTime	string	$Config/SyncTime$	Synchronization Time	The synchronization time specified by using a 24-hour format. May be omitted.
Threshold	int	$Config/Threshold$	Threshold	The collected value will be compared against this parameter.
NumSamples	int	$Config/NumSamples$	Number of samples	The number of times a measured value should breach the threshold before the state is changed.
TimeoutSeconds	int	$Config/TimeoutSeconds$	Timeout (seconds)	Specifies the time the workflow is allowed to run before being closed and marked as failed.
SqlExecTimeoutSeconds	int	$Config/SqlExecTimeoutSeconds$	Timeout for query execution (seconds)	The workflow will fail and register an event, if the query execution takes longer than the specified period.
SqlTimeoutSeconds	int	$Config/SqlTimeoutSeconds$	Timeout for database connection (seconds)	The workflow will fail and register an event, if it cannot access the database during the specified period.

Source Code:

<UnitMonitorType ID="Microsoft.SQLServer.Linux.MonitorType.DBEngine.PageLifeExpectancy" Accessibility="Internal" RunAs="SqlCoreLib!Microsoft.SQLServer.Core.RunAs.Monitoring">

  <MonitorTypeStates>

    <MonitorTypeState ID="Normal"/>

    <MonitorTypeState ID="Error"/>

  </MonitorTypeStates>

  <Configuration>

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

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

    <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="ConnectionString" type="xsd:string"/>

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

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

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

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

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

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

  </Configuration>

  <OverrideableParameters>

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

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

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

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

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

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

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

  </OverrideableParameters>

  <MonitorImplementation>

    <MemberModules>

      <DataSource ID="DS" TypeID="Microsoft.SQLServer.Linux.DataSource.SqlOsPerformanceReader">

        <MachineName>$Config/MachineName$</MachineName>

        <NetbiosComputerName>$Config/NetbiosComputerName$</NetbiosComputerName>

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

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

        <InstanceVersion>$Config/InstanceVersion$</InstanceVersion>

        <InstanceEdition>$Config/InstanceEdition$</InstanceEdition>

        <SqlExecTimeoutSeconds>$Config/SqlExecTimeoutSeconds$</SqlExecTimeoutSeconds>

        <SqlTimeoutSeconds>$Config/SqlTimeoutSeconds$</SqlTimeoutSeconds>

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

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

        <ObjectName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/PerformanceCounterObject$:Buffer Manager</ObjectName>

        <PerfInstanceName/>

        <PerfParams>

          <NameOfHandler>SqlOsPerfCounterReaderMonitor</NameOfHandler>

          <PerformanceCounterObject>$Config/PerformanceCounterObject$</PerformanceCounterObject>

          <CounterConfig>

            <CategoryName>Buffer Manager</CategoryName>

            <CounterName>Page life expectancy</CounterName>

            <BaseCounterName/>

            <InstanceSelector>2</InstanceSelector>

            <NeedsPrefix>1</NeedsPrefix>

            <InstanceIndex>0</InstanceIndex>

          </CounterConfig>

        </PerfParams>

      </DataSource>

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

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="Double">Property[@Name='CounterValue']</XPathQuery>

            </ValueExpression>

            <Operator>Less</Operator>

            <ValueExpression>

              <Value Type="Double">$Config/Threshold$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <SuppressionSettings>

          <MatchCount>$Config/NumSamples$</MatchCount>

          <SampleCount>$Config/NumSamples$</SampleCount>

        </SuppressionSettings>

      </ConditionDetection>

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

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="Double">Property[@Name='CounterValue']</XPathQuery>

            </ValueExpression>

            <Operator>GreaterEqual</Operator>

            <ValueExpression>

              <Value Type="Double">$Config/Threshold$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </ConditionDetection>

    </MemberModules>

    <RegularDetections>

      <RegularDetection MonitorTypeStateID="Normal">

        <Node ID="NormalCondition">

          <Node ID="DS"/>

        </Node>

      </RegularDetection>

      <RegularDetection MonitorTypeStateID="Error">

        <Node ID="ErrorCondition">

          <Node ID="DS"/>

        </Node>

      </RegularDetection>

    </RegularDetections>

  </MonitorImplementation>

</UnitMonitorType>