Waitopedia is a comprehensive resource of information about SQL Server waits.

The description shown below is the top answer as voted by the Spotlight community.

The charts are based on 2.1 TB of data collected from 4207 instances uploaded by 323 Spotlight users over an 8 week period.


Category: Idle
SQL Server versions: 2012, 2014, 2016, 2017

This is an idle wait and so it can be safely ignored.


1 Answer


A background task is waiting for the completion of the startup of a background task that processes Windows Server Failover Clustering notifications. Internal use only. Information from Microsoft®


This wait has never occurred recently

HADR_NOTIFICATION_WORKER_STARTUP_SYNC has not occurred recently on 4207 instances checked.

Prevalence of HADR_NOTIFICATION_WORKER_STARTUP_SYNC across the Spotlight Population