How To Fix VIRT171 - Physical CPUs Used

SAP Error Message - Details

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 171

• Message text: Physical CPUs Used

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message VIRT171 - Physical CPUs Used ?

  The SAP error message VIRT171, which indicates "Physical CPUs Used," typically arises in the context of SAP systems running on virtualized environments. This message is related to the configuration and utilization of physical CPUs in a virtual machine (VM) environment.
  Cause:
  
  Resource Allocation: The error often occurs when the number of virtual CPUs (vCPUs) allocated to the SAP instance exceeds the number of physical CPUs available on the host machine. This can lead to performance issues and resource contention.
  Configuration Issues: Misconfiguration in the SAP system or the underlying virtualization platform can also trigger this error. For example, if the SAP instance is configured to use more resources than what is physically available, it can lead to this message.
  Licensing Issues: In some cases, the error may be related to licensing constraints, where the number of CPUs used exceeds the licensed capacity.
  
  Solution:
  
  Review CPU Allocation: Check the number of vCPUs assigned to the SAP instance and compare it with the number of physical CPUs available on the host. Adjust the vCPU allocation to ensure it does not exceed the physical CPU count.
  Optimize Resource Usage: If the SAP system is under heavy load, consider optimizing the workload or scaling the infrastructure by adding more physical CPUs or moving to a more powerful host.
  Check Virtualization Settings: Ensure that the virtualization settings are correctly configured. This includes checking the hypervisor settings and ensuring that CPU resources are allocated efficiently.
  Monitor Performance: Use monitoring tools to track CPU usage and performance metrics. This can help identify bottlenecks and inform decisions about resource allocation.
  Consult Documentation: Refer to SAP Notes and documentation for specific guidance related to your version of SAP and the virtualization platform being used.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates related to this error message.
  Virtualization Platform Documentation: Review the documentation for the virtualization platform (e.g., VMware, Hyper-V) to understand best practices for CPU allocation and performance tuning.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  
  By addressing the underlying causes and following the recommended solutions, you can resolve the VIRT171 error and optimize the performance of your SAP system in a virtualized environment.