How To Fix VIRT606 - Number of Cores per Physical CPU

SAP Error Message - Details

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 606

• Message text: Number of Cores per Physical CPU

What causes this issue?

Number of CPU cores that belong to one physical CPU socket of the
virtualization host.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message VIRT606 - Number of Cores per Physical CPU ?

  The SAP error message VIRT606 indicates an issue related to the number of cores per physical CPU in a virtualized environment. This error typically arises when the configuration of the virtual machine (VM) does not align with the SAP system's requirements or recommendations regarding CPU allocation.
  Cause:
  The error is triggered when the number of virtual CPU cores assigned to a virtual machine exceeds the number of physical CPU cores available on the host machine. This can happen due to:
  
  Misconfiguration: The virtual machine is configured with more virtual CPUs than the physical CPUs available on the host.
  Virtualization Limits: Some virtualization platforms have limits on how many virtual CPUs can be assigned based on the physical CPU architecture.
  SAP Sizing Guidelines: SAP has specific guidelines for CPU allocation based on the application and workload, and exceeding these can lead to performance issues or errors.
  
  Solution:
  To resolve the VIRT606 error, you can take the following steps:
  
  
  Check Physical CPU Configuration:
  
  Verify the number of physical CPU cores on the host machine.
  Ensure that the number of virtual CPUs assigned to the VM does not exceed the number of physical cores.
  
  
  
  Adjust VM Configuration:
  
  Reduce the number of virtual CPUs assigned to the VM to match the physical CPU core count.
  If necessary, consider upgrading the physical hardware to support more cores or optimizing the workload distribution across multiple VMs.
  
  
  
  Review SAP Sizing Guidelines:
  
  Consult the SAP Quick Sizer tool or SAP Notes for recommended CPU configurations based on your specific SAP application and workload.
  Ensure that your configuration aligns with SAP's best practices.
  
  
  
  Monitor Performance:
  
  After making adjustments, monitor the performance of the SAP system to ensure that it operates within acceptable parameters.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or updates regarding CPU configurations and limitations.
  Virtualization Documentation: Refer to the documentation of your virtualization platform (e.g., VMware, Hyper-V) for best practices on CPU allocation and management.
  SAP Community: Engage with the SAP Community forums for insights and experiences from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the VIRT606 error and ensure that your SAP system is configured correctly for optimal performance.