The backup background thread of the AlwaysOn primary database is waiting for a new work request from the secondary database. (typically, this occurs when the primary database is holding the BulkOp log and is waiting for the secondary database to indicate that the primary database can release the lock). Information from Microsoft®
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.
HADR_BACKUP_QUEUE
Category: Other
SQL Server versions: 2012, 2014, 2016, 2017
What is HADR_BACKUP_QUEUE?
1 Answer
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answered 3348 days ago
Spotlight Essentials
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This wait never occurs for most instances
For each of 4207 instances, we ranked HADR_BACKUP_QUEUE on how frequent it is compared to all other recent waits. The chart shows the total of all rankings.
Prevalence of HADR_BACKUP_QUEUE across the Spotlight Population
For 86 % of hours with this wait, average wait time is less than 2 seconds
For each instance, we found all the recent hours when it had a HADR_BACKUP_QUEUE wait. We found the average latency for each of those hours.
62 instances contributed data to this chart