Microsoft have released CU 9 for SQL Server 2016 SP1!

The CU provides the following fixes and improvements (Referenced from https://support.microsoft.com/en-us/help/4100997/cumulative-update-9-for-sql-server-2016-sp1)

KB4099472 – PFS page round robin algorithm improvement in SQL Server 2016 SQL service
KB4133164 – FIX: Error when a SQL Server Agent job executes a PowerShell command to enumerate permissions of the database Management Tools
KB4086173 – FIX: Access violation occurs when executing a DAX query on a tabular model in SQL Server Analysis Services Analysis Services
KB4131193 – Performance issues occur in the form of PAGELATCH_EX and PAGELATCH_SH waits in TempDB when you use SQL Server 2016 SQL service
KB3028216 – FIX: A crash occurs when proactive caching is triggered for a dimension in SSAS Analysis Services
KB4135113 – FIX: Change tracking record is inconsistent during an update on a table which has a cluster/unique index in SQL Server SQL service
KB4293839 – FIX: TDE database goes offline during log flush operations when connectivity issues cause the EKM provider to become inaccessible in SQL Server SQL security
KB4230730 – FIX: A dead latch condition occurs when you perform an online index rebuild or execute a merge command in SQL Server SQL service
KB4163478 – FIX: An access violation occurs when incremental statistics are automatically updated on a table in SQL Server SQL performance
KB4230306 – FIX: Restore of a TDE compressed backup is unsuccessful when using the VDI client SQL service
KB4163087 – FIX: Performance is slow for an Always On AG when you process a read query in SQL Server SQL service
KB4164562 – FIX: Wrong user name appears when two users log on to MDS at different times in SQL Server Data Quality Services (DQS)
KB4094893 – FIX: Database cannot be dropped after its storage is disconnected and reconnected in SQL Server SQL service
KB4162814 – FIX: An internal exception access violation occurs and the SSAS server stops responding Analysis Services
KB4134541 – FIX: Error in the MDS Add-in for Excel when you use the German version of Excel in SQL Server Data Quality Services (DQS)
KB4132267 – FIX: Deploying a SSAS project in SSDT is frequently unsuccessful in SQL Server Analysis Services in Tabular mode Analysis Services
KB4101554 – FIX: Parallel redo in a secondary replica of an availability group that contains heap tables generates a runtime assert dump or the SQL Server crashes with an access violation error High Availability
KB4098762 – FIX: Hidden parameters are included in reports when the Browser role is used in SSRS 2016 Reporting Services
KB4134175 – FIX: Processing a cube with many partitions generates lots of concurrent data source connections in SSAS Analysis Services
KB4091245 – FIX: Access violation occurs when you query a table with an integer column in SQL Server 2017 and SQL Server 2016 SQL performance
KB4094706 – FIX: One worker thread seems to hang after another worker thread is aborted when you run a parallel query in SQL Server SQL service
KB4058175 – FIX: TDE enabled database backup and restore operations are slow when the encryption key is stored in an EKM provider in SQL Server SQL service
KB4131960 – FIX: An access violation occurs when you execute a nested select query against a columnstore index in SQL Server SQL Engine
KB4094858 – FIX: “An unexpected error occurred” when you use DAX measures in Power BI table visualizations in SQL Server Analysis Services
KB4101502 – FIX: TDE enabled database backup with compression causes database corruption in SQL Server 2016 SQL service

You can download the CU from https://www.microsoft.com/en-us/download/details.aspx?id=54613&WT.mc_id=rss_alldownloads_all

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