Query Store & Spinlocks

David Fowler ran into an issue with the Query Store process experiencing waits due to spinlocks:

We were enjoying a nice peaceful afternoon when we hear panicked shouting that a SQL Server had become unresponsive and the customers were unable to do anything.

We moseyed on down to the server in question to take a look at it.  One thing stood out immediately, CPU was pegged out at 100% but SQL itself didn’t actually seem to be doing anything, transactions\second was on the floor. Unfortunately this happened a while back and I didn’t think to capture any graphs or metrics at the time so you’re just going to have to take my word for this.

The issue David ran into was subsequently fixed, making this a cautionary tale to keep those SQL Server instances patched.

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Query Store On Azure SQL DW

Matt Usher announces Query Store is now available to all in Azure SQL Data Warehouse: Since our preview announcement, hundreds of customers have been enabling Query Store to provide insight on query performance. We’re excited to share the general availability of Query Store worldwide for Azure SQL Data Warehouse. Query Store automatically captures a history of queries, plans, and […]

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Query Store Bugfixes

Erin Stellato has a roundup of Query Store bugfixes as of January 2019: The latest CUs for SQL Server 2016 and 2017 contain some important Query Store fixes that I thought worth mentioning for those of you on either version or those of you looking to upgrade.  As of this writing, the current CU for […]

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