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This is the official team Web Log for Microsoft Customer Service and Support (CSS) SQL Support. Posts are provided by the CSS SQL Escalation Services team.
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    Recently we got a customer who called in and wanted to know why he received NULL for query_plan when querying sys.dm_exec_query_plan.   This customer referenced a blog from https://dzone.com/articles/dmexecqueryplan-returning-null.  In that scenario, you will get NULL for query_plan if there are any statements involving temp tables that have not been executed for the first time.   For...

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    If you need to open up your SQL Server on an Azure VM to public internet access, you need to look no further than this document Connect to a SQL Server Virtual Machine on Azure (Resource Manager). It has very detailed step-by-step instructions. On a very high level, here are steps In your VM, create...

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    If you created an SQL Server VM via azure portal, there will be a section called “SQL Server Configuration” which was introduced via blog “Introducing a simplified configuration experience for SQL Server in Azure Virtual Machines”. Here is a screenshot of that setting.  It allows you to configure various things like auto backup, patching or...

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        With so many users new to Azure, Sometimes an issue appears more complex than it really is.  If you back up your databases to Azure blob storage but your company uses proxy servers for internet access, you will need to configure backuptoURL.exe.config  per SQL Server Backup to URL Best Practices and Troubleshooting.  We...

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    Lately, we had a customer who contacted us for a performance issue where their server performed much worse in SQL Server 2016 following upgrade.  To show us as an example, he even captured a video.  In the video, he showed that the session that was compiling the query had multiple threads waiting on LATCH_EX of...

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    Recently we got a call from customer who was trying to enable stretch database but repeatedly got errors like below: Oct 14 2016 13:52:05 [Informational] TaskUpdates: Message:Task : ‘Configure Stretch on the Database stretchdb6’ — Status : ‘Running’ — Details : ‘Task failed due to following error: Microsoft.SqlServer.Management.Smo.FailedOperationException: Alter failed for Database ‘stretchdb6’.  —> Microsoft.SqlServer.Management.Common.ExecutionFailureException:...

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    There are multiple levels of throttling with Azure.  You can get throttled at disk level, storage account level or VM/host level.    These types of throttling can manifest into something that may not be that obvious. Recently we received a call from customer who was backing up databases from Azure VM to Azure blob storage.  The...

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    A user called in for help because he wasn’t able to drop a user from a database.  The error message is below Msg 15136, Level 16, State 1, Line 2The database principal is set as the execution context of one or more procedures, functions, or event notifications and cannot be dropped. From the error, the...

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    We just released SQL Nexus 5.5.0.1 on codeplex.   In addition to numerous ‘rules’ that catch issues that can potentially impact your SQL Server performance, we added quite a few reports.  Some of the reports are displayed below. The following three were born out of troubleshooting experience. “Top 20 Active CPU Intensive Queries”:  When troubleshooting CPU...

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    When it comes to troubleshooting, the more you know the better troubleshooter you are (in my option). Sometimes knowing more actually gets in the way.   We repeatedly get calls where customers couldn’t connect to AlwaysOn Listener on Azure because of the misconfiguration of the subnet mask for the listener IP. They receive this error “A...