HADR_AG_MUTEX

Description

For databases utilizing Availability Groups. Used internally while SQL Server and Windows Failover Clustering are waiting for exclusive access to the Availability Group configuration settings. This wait is common, investigation is required if the values are excessive

Resolved by

DBAs

Suggested solutions

  1. Examine Windows Failover Clustering logs for any issues
  2. Check the SQL Server error log for more information
  3. Examine wait statistics on the instance for other Availability Group issues. Investigate accordingly

Additional research

AlwaysOn Availability Groups Troubleshooting and Monitoring Guide

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