HADR_PARTNER_SYNC

Description

For databases utilizing Availability Groups. Occurs when SQL Server is waiting to access partner list. It does not mean partners are synchronizing data like HADR_SYNC_COMMIT. This wait type is common and small values indicate regular activity. If values are excessive see suggested solutions below.

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

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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