How To Fix RT863 - Number of CPUs in Pool

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 863

• Message text: Number of CPUs in Pool

What causes this issue?

Denotes the number of physical CPU's assigned the shared pool from which
this partition receives it resources.

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 RT863 - Number of CPUs in Pool ?

  The SAP error message RT863, which states "Number of CPUs in Pool," typically relates to issues with the configuration of the SAP system's resource allocation, particularly in relation to the number of CPUs assigned to a particular instance or pool.
  Cause:
  
  Configuration Issues: The error often arises when the number of CPUs configured for a particular instance exceeds the number of CPUs available in the system or pool.
  Resource Allocation: It can also occur if there is a mismatch in the resource allocation settings in the SAP system or if the underlying operating system does not support the requested configuration.
  Licensing Issues: Sometimes, the error can be related to licensing restrictions that limit the number of CPUs that can be used by the SAP instance.
  
  Solution:
  
  
  Check Configuration: Review the instance profile settings in the SAP system. Ensure that the number of CPUs configured does not exceed the physical or virtual CPUs available on the server.
  
  You can check the instance profile using transaction code RZ10 or RZ11.
  
  
  
  Adjust CPU Allocation: If the configuration is incorrect, adjust the number of CPUs in the instance profile to match the available resources. This can be done by editing the instance profile and changing the parameter rdisp/num_cpus to a valid number.
  
  
  Review System Resources: Ensure that the underlying operating system has the necessary resources allocated. This may involve checking the server's hardware configuration or virtual machine settings if running in a virtualized environment.
  
  
  Check Licensing: Verify that your SAP licensing allows for the number of CPUs you are trying to configure. If there are licensing restrictions, you may need to contact SAP support or your SAP account representative.
  
  
  Restart the Instance: After making changes to the configuration, restart the SAP instance for the changes to take effect.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to RT863 for any specific guidance or updates from SAP regarding this error.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Documentation: Refer to the official SAP documentation for guidance on instance configuration and resource management.
  
  If the issue persists after following these steps, it may be beneficial to consult with SAP support for further assistance.