How To Fix VIRT407 - Logical CPUs

SAP Error Message - Details

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 407

• Message text: Logical CPUs

What causes this issue?

This is the number of logical CPUs on the host machine. If the number of
physical CPUs (cores) differs from the number of logical CPUs,
Hyperthreading is activated.

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 VIRT407 - Logical CPUs ?

  The SAP error message VIRT407 typically relates to issues with the configuration of logical CPUs in a virtualized environment. This error can occur when the number of logical CPUs assigned to an SAP instance exceeds the limits set by the operating system or the virtualization platform.
  Cause:
  
  Exceeding CPU Limits: The error often arises when the number of logical CPUs assigned to the SAP instance exceeds the maximum allowed by the operating system or the virtualization environment.
  Configuration Issues: Misconfiguration in the SAP system or the underlying virtualization platform can lead to this error.
  Resource Allocation: Insufficient resources allocated to the virtual machine (VM) running the SAP instance can also trigger this error.
  
  Solution:
  
  
  Check CPU Configuration:
  
  Verify the number of logical CPUs assigned to the SAP instance in the virtualization platform (e.g., VMware, Hyper-V).
  Ensure that the number of logical CPUs does not exceed the maximum allowed by the operating system and the virtualization platform.
  
  
  
  Adjust CPU Allocation:
  
  If the number of logical CPUs is too high, reduce the allocation in the VM settings.
  Ensure that the CPU allocation is in line with the licensing agreements and the capabilities of the physical hardware.
  
  
  
  Review SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide guidance on configuration best practices.
  
  
  
  Monitor Resource Usage:
  
  Use monitoring tools to check the CPU usage and performance of the SAP instance. This can help identify if the current configuration is optimal or if adjustments are needed.
  
  
  
  Consult Documentation:
  
  Review the documentation for both SAP and the virtualization platform to ensure compliance with best practices regarding CPU allocation.
  
  
  
  Related Information:
  
  SAP Notes: Always check for the latest SAP Notes related to your specific version of SAP and the error message. SAP Notes often contain patches, configuration tips, and other relevant information.
  Virtualization Documentation: Refer to the documentation of the virtualization platform you are using (e.g., VMware, Hyper-V) for guidelines on CPU allocation and limitations.
  Performance Tuning: Consider performance tuning for your SAP instance, which may involve adjusting not just CPU settings but also memory and storage configurations.
  
  If the issue persists after following these steps, it may be beneficial to reach out to SAP support or your virtualization platform's support for further assistance.