How To Fix PO091 - Processing group for normal requests: Number of work processes

SAP Error Message - Details

• Message type: E = Error

• Message class: PO - Spooler message

• Message number: 091

• Message text: Processing group for normal requests: Number of work processes

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 PO091 - Processing group for normal requests: Number of work processes ?

  The SAP error message PO091 typically indicates an issue related to the processing group for normal requests, specifically concerning the number of work processes available in the SAP system. This error can occur when the system is unable to allocate enough work processes to handle the incoming requests, leading to performance issues or request processing failures.
  Cause:
  
  Insufficient Work Processes: The number of work processes configured in the SAP system may be too low to handle the current workload.
  High Load: A sudden spike in user activity or background jobs can lead to all available work processes being occupied, causing new requests to be queued or rejected.
  Configuration Issues: Incorrect configuration of the instance profile settings related to work processes can lead to this error.
  Long-Running Transactions: If there are transactions that take a long time to complete, they can tie up work processes, leading to a shortage for new requests.
  
  Solution:
  
  
  Increase Work Processes:
  
  Review the current configuration of work processes in the instance profile (transaction RZ10).
  Increase the number of dialog, background, or update work processes as needed, depending on the system's workload and performance requirements.
  After making changes, restart the SAP instance for the changes to take effect.
  
  
  
  Monitor System Load:
  
  Use transaction SM50 or SM66 to monitor the current workload and see which processes are consuming resources.
  Identify and address any long-running transactions that may be holding up work processes.
  
  
  
  Optimize Background Jobs:
  
  Review and optimize background jobs to ensure they are not consuming excessive resources or running during peak hours.
  Schedule jobs during off-peak times if possible.
  
  
  
  Check for Errors:
  
  Investigate any errors in the system logs (transaction SM21) that may indicate issues with specific transactions or processes.
  
  
  
  System Performance Tuning:
  
  Consider tuning the overall system performance by analyzing database performance, network latency, and other factors that may affect processing times.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to work process management and performance tuning for specific recommendations and best practices.
  SAP Documentation: Refer to the official SAP documentation for detailed information on configuring work processes and managing system performance.
  Transaction Codes:
  
  RZ10: To change instance profile parameters.
  SM50: To monitor work processes.
  SM66: To monitor work processes across the entire system.
  SM21: To check system logs for errors.
  
  
  
  By addressing the underlying causes and implementing the suggested solutions, you should be able to resolve the PO091 error and improve the processing capabilities of your SAP system.