This monitor is a dependency (rollup) monitor. The monitor checks availability of a database log backup and its age as reported by Microsoft SQL Server.
This monitor checks the existence and age of the database log backup as reported by Microsoft SQL Server. This is done by running a query against the master database of the SQL instance and returning the age of the database log backup.
Note that due to the Availability Group database log backup specifics, the alerting for this rollup monitor is disabled by default and it is not recommended to enable it. The actual health state of the availability database log backup shows the "Availability Database Log Backup Status (rollup)", which has the 'Best state of any member' health rollup policy option.
Availability Database log has not been backed up for too long.
You should perform a backup of one of the availability database replicas to resolve the issue.
To eliminate this issue in future it is recommended to schedule an automated backup according to the needs of the application and business requirements.
Name | Description | Default Value |
Alert Priority | Defines Alert Priority. | Normal |
Alert Severity | Defines Alert Severity. | Error |
Enabled | Enables or disables the workflow. | Yes |
Generates Alerts | Defines whether the workflow generates an Alert. | No |
| Target | Microsoft.SQLServer.Core.AvailabilityDatabase |
| Parent Monitor | Microsoft.SQLServer.Core.Rollup.AvailabilityDatabase.DBLogBackupStatusAggregate |
| Algorithm | BestOf |
| Source Monitor | Microsoft.SQLServer.Linux.Monitor.AvailabilityDatabaseHealth.DBLogBackupStatus |
| Relationship | Microsoft.SQLServer.Linux.AvailabilityDatabaseReferencesAvailabilityDatabaseHealth |
| Category | AvailabilityHealth |
| Enabled | True |
| Alert Generate | False |
| Alert Auto Resolve | False |
| Remotable | True |
| Accessibility | Public |
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<DependencyMonitor ID="Microsoft.SQLServer.Linux.Rollup.AvailabilityDatabase.DBLogBackupStatus" Accessibility="Public" Enabled="true" Target="SqlCoreLib!Microsoft.SQLServer.Core.AvailabilityDatabase" ParentMonitorID="SqlCoreLib!Microsoft.SQLServer.Core.Rollup.AvailabilityDatabase.DBLogBackupStatusAggregate" Remotable="true" Priority="Normal" RelationshipType="SqlDiscL!Microsoft.SQLServer.Linux.AvailabilityDatabaseReferencesAvailabilityDatabaseHealth" MemberMonitor="Microsoft.SQLServer.Linux.Monitor.AvailabilityDatabaseHealth.DBLogBackupStatus">
<Category>AvailabilityHealth</Category>
<Algorithm>BestOf</Algorithm>
<MemberUnAvailable>Warning</MemberUnAvailable>
</DependencyMonitor>