MSSQL on Linux: Missed Credit Slots

Microsoft.SQLServer.Linux.CollectionRule.DBEngine.XtpIoGovernor_MissedCreditSlots (Rule)

Collects the Linux "Missed Credit Slots" performance counter for the XTP IO Rate Governor.

Knowledge Base article:

Summary

The rule collects the Linux "Missed Credit Slots" performance counter for the XTP IO Rate Governor.

The XTP IO Governor performance object contains counters related to the XTP IO Rate Governor.

Missed Credit Slots - Number of credit slots missed because of wait for credits from rate object.

Overrideable Parameters

Name	Description	Default Value
Enabled	Enables or disables the workflow.	Yes
Interval (seconds)	The recurring interval of time in seconds in which to run the workflow.	900
Timeout (seconds)	Specifies the time the workflow is allowed to run before being closed and marked as failed.	300
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:

Target	Microsoft.SQLServer.Linux.DBEngine
Category	PerformanceCollection
Enabled	True
Alert Generate	False
Remotable	True

Member Modules:

ID	Module Type	TypeId	RunAs
DS	DataSource	Microsoft.SQLServer.Linux.DataSource.SqlOsPerformanceReader	Default
PerfMapper	ConditionDetection	System.Performance.DataGenericMapper	Default
WriteToDB	WriteAction	Microsoft.SystemCenter.CollectPerformanceData	Default
WriteToDW	WriteAction	Microsoft.SystemCenter.DataWarehouse.PublishPerformanceData	Default

Source Code:

<Rule ID="Microsoft.SQLServer.Linux.CollectionRule.DBEngine.XtpIoGovernor_MissedCreditSlots" Target="SqlDiscL!Microsoft.SQLServer.Linux.DBEngine" Enabled="true">

  <Category>PerformanceCollection</Category>

  <DataSources>

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

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

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

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

      <SqlTimeoutSeconds>15</SqlTimeoutSeconds>

      <TimeoutSeconds>300</TimeoutSeconds>

      <IntervalSeconds>900</IntervalSeconds>

      <ObjectName>SQL Server 2017 XTP IO Governor</ObjectName>

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

      <PerfParams>

        <NameOfHandler>SqlOsPerfCounterReader</NameOfHandler>

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

        <CounterConfig>

          <CategoryName>SQL Server 2017 XTP IO Governor</CategoryName>

          <CounterName>Missed Credit Slots</CounterName>

          <BaseCounterName/>

          <InstanceSelector>3</InstanceSelector>

          <NeedsPrefix>0</NeedsPrefix>

          <InstanceIndex>1</InstanceIndex>

        </CounterConfig>

      </PerfParams>

    </DataSource>

  </DataSources>

  <ConditionDetection ID="PerfMapper" TypeID="SystemPerf!System.Performance.DataGenericMapper">

    <ObjectName>SQL DB Engine:Missed Credit Slots</ObjectName>

    <CounterName>Missed Credit Slots</CounterName>

    <InstanceName/>

    <Value>$Data/Property[@Name='CounterValue']$</Value>

  </ConditionDetection>

  <WriteActions>

    <WriteAction ID="WriteToDB" TypeID="SC!Microsoft.SystemCenter.CollectPerformanceData"/>

    <WriteAction ID="WriteToDW" TypeID="SCDW!Microsoft.SystemCenter.DataWarehouse.PublishPerformanceData"/>

  </WriteActions>

</Rule>