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MSSQL 2016: DB Transaction Log Free Space Total (\%)

Microsoft.SQLServer.2016.Database.TransactionLogSpaceFreePercent.Collection (Rule)

Collect unused transaction log space reported by SQL Server as a percentage of total transaction log space

Knowledge Base article:

Summary

SQL 2016 DB DB Transaction Log Free Space Total (%)

If AutoGrow is enabled then this metric depends on the free space on the media, which hosts a transaction log file.

Overrideable Parameters

Name

Description

Default Value

Azure Maximum File Size (MB)

The maximum size of data file stored in Azure BLOB Storage. The workflow will consider this value as a maximum storage capacity for each file.

1048576

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

Element properties:

TargetMicrosoft.SQLServer.2016.Database
CategoryPerformanceCollection
EnabledTrue
Alert GenerateFalse
RemotableTrue

Member Modules:

ID Module Type TypeId RunAs 
DS DataSource Microsoft.SQLServer.2016.DBSizeRawPerfProvider 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.2016.Database.TransactionLogSpaceFreePercent.Collection" Target="SQL2016Core!Microsoft.SQLServer.2016.Database" Enabled="true">

  <Category>PerformanceCollection</Category>

  <DataSources>

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

      <IntervalSeconds>900</IntervalSeconds>

      <SyncTime/>

      <ConnectionString>$Target/Host/Property[Type="SQL2016Core!Microsoft.SQLServer.2016.DBEngine"]/ConnectionString$</ConnectionString>

      <ServerName>$Target/Host/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</ServerName>

      <SqlInstanceName>$Target/Host/Property[Type="SQL2016Core!Microsoft.SQLServer.2016.ServerRole"]/InstanceName$</SqlInstanceName>

      <ObjectName>$Target/Host/Property[Type="SQL2016Core!Microsoft.SQLServer.2016.DBEngine"]/PerformanceCounterObject$:TransactionLog</ObjectName>

      <CounterName>Log Free Space (%)</CounterName>

      <InstanceName>$Data/Property[@Name='Database']$</InstanceName>

      <DatabaseName>$Target/Property[Type="SQL2016Core!Microsoft.SQLServer.2016.Database"]/DatabaseName$</DatabaseName>

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

      <TimeoutSeconds>300</TimeoutSeconds>

      <AzureMaxFileSizeMB>1048576</AzureMaxFileSizeMB>

    </DataSource>

  </DataSources>

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

    <ObjectName>SQL Database</ObjectName>

    <CounterName>DB Transaction Log Available Space Total (%)</CounterName>

    <InstanceName/>

    <Value>$Data/Value$</Value>

  </ConditionDetection>

  <WriteActions>

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

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

  </WriteActions>

</Rule>