HADR_AR_CRITICAL_SECTION_ENTRY

Description

For databases utilizing Availability Groups. This wait accumulates while TSQL Availability Group commands or Windows Server Failover Clustering are waiting for exclusive access to the local replicas runtime state. This wait type is common and small values are expected. If values are high see suggestions below

Resolved by

DBAs

Suggested solutions

  1. Check the SQL Server error log for more information
  2. Examine wait statistics on the instance for other Availability Group issues. Investigate accordingly

Additional research

AlwaysOn Availability Groups Troubleshooting and Monitoring Guide

See more

Consider using ApexSQL Monitor, a Windows and SQL Server monitoring tool able to track SQL Server wait types, including the individual query wait statistics

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