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Synchronous Replicas Data Synchronization (Windows rollup)

Microsoft.SQLServer.Windows.Rollup.AvailabilityGroup.AvailabilityReplicasSynchronizationState (DependencyMonitor)

This monitor rolls up the data synchronization state of all availability replicas and checks whether any availability replica is not in the expected synchronization state. The monitor is unhealthy when any asynchronous replica is not in SYNCHRONIZING state and any synchronous replica is not in SYNCHRONIZED state. The monitor state is healthy otherwise. This monitor is a dependency (rollup) monitor.

Knowledge Base article:

Summary

This monitor rolls up the data synchronization state of all availability replicas and checks whether any availability replica is not in the expected synchronization state. The monitor is unhealthy when any asynchronous replica is not in SYNCHRONIZING state and any synchronous replica is not in SYNCHRONIZED state. The monitor state is healthy otherwise.

Causes

In this availability group, at least one synchronous replica is not currently synchronized. The replica synchronization state could be either SYNCHRONIZING or NOT SYNCHRONIZING.

Resolutions

Find the availability replica with incorrect synchronization state using availability replica monitor state and resolve the issue at the availability replica.

Overridable Parameters

Name

Description

Default Value

Enabled

Enables or disables the workflow.

Yes

Generates Alerts

Defines whether the workflow generates an Alert.

No

Element properties:

TargetMicrosoft.SQLServer.Core.AvailabilityGroup
Parent MonitorMicrosoft.SQLServer.Core.Rollup.AvailabilityGroup.AvailabilityReplicasSynchronizationState
AlgorithmWorstOf
Source MonitorMicrosoft.SQLServer.Windows.Monitor.AvailabilityGroupHealth.AvailabilityReplicasSynchronizationState
RelationshipMicrosoft.SQLServer.Windows.AvailabilityGroupReferencesAvailabilityGroupHealth
CategoryAvailabilityHealth
EnabledTrue
Alert GenerateFalse
Alert Auto ResolveTrue
RemotableTrue
AccessibilityPublic

Source Code:

<DependencyMonitor ID="Microsoft.SQLServer.Windows.Rollup.AvailabilityGroup.AvailabilityReplicasSynchronizationState" Accessibility="Public" Enabled="true" Target="SqlCoreLib!Microsoft.SQLServer.Core.AvailabilityGroup" ParentMonitorID="SqlCoreLib!Microsoft.SQLServer.Core.Rollup.AvailabilityGroup.AvailabilityReplicasSynchronizationState" Remotable="true" Priority="Normal" RelationshipType="SqlDiscW!Microsoft.SQLServer.Windows.AvailabilityGroupReferencesAvailabilityGroupHealth" MemberMonitor="Microsoft.SQLServer.Windows.Monitor.AvailabilityGroupHealth.AvailabilityReplicasSynchronizationState">

  <Category>AvailabilityHealth</Category>

  <Algorithm>WorstOf</Algorithm>

  <MemberUnAvailable>Warning</MemberUnAvailable>

</DependencyMonitor>