SQL Server Always On


The SQL Server Always On page shows Availability Group, replica, and database synchronization health. Use it to monitor high availability and disaster recovery status.

Mini DBA SQL Server Always On

What You Can See

  • Availability groups.
  • Replica health.
  • Database synchronization state.
  • Primary and secondary health.
  • Group synchronization health.
  • Database-level availability status.

Workflow

  1. Open Always On for the SQL Server.
  2. Review health badges for groups, replicas, and databases.
  3. Select groups or replicas for detail where available.
  4. Check Error Log for matching availability messages.
  5. Check Alerts for related availability alerts.

How To Review Always On Health

Use the Always On page when availability, failover readiness, or replica synchronization is the question. It helps DBAs see whether availability groups, replicas, and databases are healthy from the monitoring console before drilling into SQL Server error messages or alerts.

Start with unhealthy or warning states, then identify whether the issue affects one database, one replica, or the whole availability group. A database-level synchronization problem may have a different cause from a replica connectivity problem. Compare the page with SQL Server Error Log for failover, seeding, connection, and recovery messages.

For production high availability environments, record the group, replica, database, time, and observed state before making changes. Availability fixes can affect failover behavior and should follow your normal SQL Server HA process.

SQL Server Always On FAQ

Should I check Always On during every SQL Server incident?

Check it when the workload uses Availability Groups or when symptoms include failover, synchronization, replica, or availability alerts.

Why does a database show unhealthy while the server is online?

The SQL Server instance may be running while a database, replica, or synchronization state has a separate problem.

What should I compare with Always On status?

Use SQL Server Error Log, server alerts, health checks, network events, and recent failover or maintenance activity.

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