High CPU usage on one CPU core when using a multi-core server for Veeam ONE database

KB ID: 1624
Product: Veeam ONE
Version: all
Last Modified: 2016-10-19


On the SQL Server 2008 R2 Express where Veeam ONE database is located, one of CPU cores is consistently showing high utilization (almost always close to 100%), even if other CPU cores are idle (5-9% utilization).


This is by Microsoft design. SQL Server 2008 R2 Express is limited to use only one CPU core at a time. If it is installed on a server with multiple CPU cores, it will still use only one CPU core at a time. More information can be found here.


To get a more scalable database back-end system, upgrade the SQL Server 2008 R2 from the Express to the Standard edition (at least).

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If you have any questions or problems, please contact Veeam Support at http://www.veeam.com/support.html
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