Data synchronization state of availability database is not healthy for an Always On availability group

Applies to: SQL Server


  • Policy Name: Availability Database Data Synchronization State
  • Issue: Data synchronization state of availability database is not healthy.
  • Category: Warning
  • Facet: Availability database


This policy rolls up the data synchronization state of all availability databases (also known as "database replicas") in the availability replica. The policy is in an unhealthy sate when any database replica is not in the expected data synchronization state. The policy is otherwise in a healthy state.

Possible Causes

The data synchronization state of this availability database is unhealthy. On an asynchronous-commit availability replica, every availability database should be in the SYNCHRONIZING state. On a synchronous-commit replica, every availability database must be in the SYNCHRONIZED state.

Possible Solution

Use the database replica policy to find the database replica with an unhealthy data synchronization state, and then resolve the issue at the database replica.

See Also

Overview of Always On Availability Groups (SQL Server)
Use the Always On Dashboard (SQL Server Management Studio)