How To Fix VIRT313 - Max. Number of CP

SAP Error Message - Details

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 313

• Message text: Max. Number of CP

Max. Number of CP
Maximum of the number of logical processors(CP) online to the partition
within the last collection interval.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message VIRT313 - Max. Number of CP ?

  The SAP error message VIRT313, which states "Max. Number of CP," typically relates to the maximum number of communication processes (CP) that can be established in a given SAP system. This error can occur in various scenarios, particularly when dealing with SAP's application server or when there are limitations on the number of concurrent processes that can be handled.
  Cause:
  
  Exceeded Limit: The error usually indicates that the maximum number of communication processes has been exceeded. This can happen if there are too many users trying to connect to the system simultaneously or if there are long-running processes that are consuming available communication processes.
  Configuration Settings: The configuration settings for the number of communication processes in the SAP system may be set too low for the current workload.
  Resource Constraints: The underlying hardware or system resources may be insufficient to handle the number of processes being requested.
  
  Solution:
  
  
  Increase the Number of Communication Processes:
  
  You can increase the number of communication processes in the SAP system by adjusting the profile parameters. This is typically done in the instance profile (e.g., DEFAULT.PFL or the specific instance profile).
  Look for the parameter rdisp/wp_no_dia (for dialog work processes) and rdisp/wp_no_btc (for background work processes) and increase their values as needed.
  After making changes, restart the SAP instance for the changes to take effect.
  
  
  
  Monitor and Optimize Workload:
  
  Use transaction codes like SM50 or SM66 to monitor the current workload and see if there are any long-running processes that can be optimized or terminated.
  Analyze the workload patterns and adjust the number of processes accordingly.
  
  
  
  Check System Resources:
  
  Ensure that the underlying hardware (CPU, memory, etc.) is sufficient to handle the increased number of communication processes.
  If necessary, consider upgrading the hardware or optimizing the system configuration.
  
  
  
  Review User Connections:
  
  Check if there are any unnecessary user connections that can be terminated to free up communication processes.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to VIRT313 for any specific recommendations or patches that may address this issue.
  SAP Documentation: Refer to the official SAP documentation for detailed information on configuring work processes and understanding system limits.
  Performance Monitoring: Regularly monitor system performance and user activity to prevent reaching the maximum limits in the future.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.