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Wednesday, April 16, 2025 Login
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Blog posts for the month of April,2025.
rbio_await_response4/11/2025 5:34:48 AM
Began seeing a new wait time for Azure SQL Server on hyperscale tier, rbio_await_response.

It is not affecting performance, but does show up as a wait time with no sql statement associated with it.

Response from Microsoft is that this was the result of a recent patch and they are researching.

Logins coming from user {machine}\\{windows fabric user} or NTAUTHORITY\SYSTEM and they are related to some of our internal tasks like Backup or running other background tasks. You may see the same logins in sp_who2 running system threads as well. There’s no negative performance on the db because of this wait type and the queries coming from System user and the program name Fabric:/Worker.Vldb.Compute/facb87701e95. In fact, Fabric:/Worker.Vldb.Compute/facb87701e95 is basically the HS behind the covers.

We are working internally and exploring available options to correct this behavior.


A copilot generated image, including odd spelling:



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