MSSQL on Windows: Checkpoint File Pairs Waiting For Log Truncation

Microsoft.SQLServer.Windows.CollectionRule.DBFileGroupFx.CheckpointFile.Stale (Rule)

Collects the number of Checkpoint Files Waiting For Log Truncation in Memory-Optimized Data Filegroup.

Knowledge Base article:

Summary

The rule collects the number of checkpoint file pairs waiting for log truncation in Memory-Optimized Data Filegroup.

Once the merge has been installed and the MERGE TARGET CFP is part of durable checkpoint, the merge source checkpoint files transition into this state. Files in this state are needed for operational correctness of the database with memory-optimized table. For example, to recover from a durable checkpoint to go back in time.

Overridable 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
Synchronization Time	The synchronization time specified by using a 24-hour format. May be omitted.
Timeout (seconds)	Specifies the time the workflow is allowed to run before being closed and marked as failed.	300
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:

Target	Microsoft.SQLServer.Windows.DBFilegroupFx
Category	PerformanceCollection
Enabled	True
Alert Generate	False
Remotable	True

Member Modules:

ID	Module Type	TypeId	RunAs
DS	DataSource	Microsoft.SQLServer.Windows.DataSource.HKFilePairs	Default
Mapper	ConditionDetection	System.Performance.DataGenericMapper	Default
WriteToDB	WriteAction	Microsoft.SystemCenter.CollectPerformanceData	Default
WriteToDW	WriteAction	Microsoft.SystemCenter.DataWarehouse.PublishPerformanceData	Default

Source Code:

<Rule ID="Microsoft.SQLServer.Windows.CollectionRule.DBFileGroupFx.CheckpointFile.Stale" Target="SqlDiscW!Microsoft.SQLServer.Windows.DBFilegroupFx" Enabled="true">

  <Category>PerformanceCollection</Category>

  <DataSources>

    <DataSource ID="DS" TypeID="Microsoft.SQLServer.Windows.DataSource.HKFilePairs">

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

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

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

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

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

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

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

      <DatabaseName>$Target/Host/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.Database"]/DatabaseName$</DatabaseName>

      <State>8</State>

      <SqlExecTimeoutSeconds>60</SqlExecTimeoutSeconds>

      <SqlTimeoutSeconds>15</SqlTimeoutSeconds>

      <TimeoutSeconds>300</TimeoutSeconds>

      <IntervalSeconds>900</IntervalSeconds>

      <SyncTime/>

    </DataSource>

  </DataSources>

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

    <ObjectName>Memory-Optimized Filegroup</ObjectName>

    <CounterName>Waiting For Log truncation Checkpoint File Pairs</CounterName>

    <InstanceName/>

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

  </ConditionDetection>

  <WriteActions>

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

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

  </WriteActions>

</Rule>