How To Fix RT866 - Available Physical CPUs

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 866

• Message text: Available Physical CPUs

What causes this issue?

The available physical CPU's represents the physical processing power
available to the LPAR taking into account both the partition's
entitlement and any additional processing resources unused by other
partitions.

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 RT866 - Available Physical CPUs ?

  The SAP error message RT866, which refers to "Available Physical CPUs," typically indicates that the system has reached a limit regarding the number of physical CPUs that can be utilized for processing. This can occur in various scenarios, such as when the system is configured to use a certain number of CPUs, but the actual available CPUs are fewer than expected.
  Cause:
  
  Configuration Limits: The SAP system may be configured to use more CPUs than are physically available on the server.
  Licensing Issues: There may be licensing restrictions that limit the number of CPUs that can be used by the SAP instance.
  Resource Allocation: The operating system or virtualization layer may not be allocating the expected number of CPUs to the SAP instance.
  Hardware Limitations: The physical server may not have enough CPUs installed or may be experiencing hardware issues.
  
  Solution:
  
  
  Check Configuration: Review the SAP instance configuration to ensure that the number of CPUs specified does not exceed the physical CPUs available on the server.
  
  You can check this in the SAP profile parameters (e.g., rdisp/num_cpus).
  
  
  
  Review Licensing: Verify that your SAP license allows for the number of CPUs you are trying to use. If necessary, consult with your SAP account representative to adjust your licensing.
  
  
  Operating System Settings: Ensure that the operating system is configured to allocate the correct number of CPUs to the SAP instance. This may involve checking settings in the OS or virtualization platform.
  
  
  Physical Hardware Check: Inspect the physical server to confirm that all CPUs are functioning correctly and are recognized by the operating system. You may need to check BIOS settings or perform hardware diagnostics.
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message or provide additional troubleshooting steps.
  
  
  Restart the Instance: In some cases, restarting the SAP instance or the entire server may resolve temporary resource allocation issues.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for your specific version to understand CPU configuration and limitations.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  System Monitoring Tools: Utilize system monitoring tools to track CPU usage and performance metrics, which can help identify bottlenecks or misconfigurations.
  
  If the issue persists after following these steps, it may be beneficial to contact SAP support for further assistance.