Data Monitoring / SQL Server Availability & Capacity
SQL Server: Failover readiness
A synchronized-looking replica has an untested application reconnect path. Review replica health alongside listener connectivity, login dependencies and a documented failover exercise.
Environment and inputs: SQL Server operational monitoring; availability groups, SQL Agent and host-level metrics depend on edition, service and deployment.
Failure scenario
A synchronized-looking replica has an untested application reconnect path. Confirm the cause before choosing a fix.
Evidence to collect
Review replica health alongside listener connectivity, login dependencies and a documented failover exercise. Record the time, affected scope and a healthy comparison interval.
Fix the confirmed cause
Validate an approved failover scenario end to end before using health indicators as a readiness guarantee. Write the expected result first. Change one relevant setting at a time.
Check the result and hand over
Repeat the check for failover readiness using the same scope and a representative interval. Check that the symptom is resolved, expected records are present and downstream results are correct. If coverage, correctness or latency worsens, restore the recorded configuration through the agreed rollback process.
Scope and precautions
Prefer read-only access and limit queries to the relevant period or dataset. This example has not been tested on your systems. Test changes in an approved environment. Keep credentials and sensitive data out of shared evidence.