How To Fix /PRA/PN133 - Resource wait; contention in group &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /PRA/PN -

• Message number: 133

• Message text: Resource wait; contention in group &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PRA/PN133 - Resource wait; contention in group &1 ?

  The SAP error message /PRA/PN133 Resource wait; contention in group &1 typically indicates that there is a contention issue in a specific resource group within the SAP system. This can occur in various scenarios, such as when multiple processes or users are trying to access the same resource simultaneously, leading to a wait state.
  Cause:
  
  Resource Contention: Multiple processes are trying to access the same resource (e.g., database locks, application locks, or other shared resources).
  Long-running Transactions: A transaction that takes a long time to complete can hold locks longer than necessary, causing other transactions to wait.
  Configuration Issues: Incorrect configuration of resource groups or insufficient resources allocated to handle the workload.
  High Load: A sudden spike in user activity or background jobs can lead to contention for resources.
  
  Solution:
  
  
  Identify the Contention:
  
  Use transaction codes like SM12 (to check for locks), SM21 (to check system logs), and ST22 (to check dumps) to identify which processes are causing the contention.
  Analyze the workload using ST03N to see if there are specific transactions or users causing the issue.
  
  
  
  Optimize Long-running Transactions:
  
  Review and optimize any long-running transactions to ensure they complete more quickly and release locks sooner.
  Consider breaking down large transactions into smaller, more manageable ones.
  
  
  
  Adjust Resource Allocation:
  
  If the contention is due to insufficient resources, consider increasing the resources allocated to the affected group or optimizing the configuration.
  
  
  
  Implement Lock Management:
  
  Review the locking strategy in your application to minimize unnecessary locks.
  Use appropriate isolation levels in database transactions to reduce contention.
  
  
  
  Monitor and Tune Performance:
  
  Regularly monitor system performance and tune the database and application settings to handle peak loads more effectively.
  Consider implementing load balancing or scaling out the system if necessary.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may address known issues related to resource contention.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to SAP Help Portal for detailed documentation on resource management and performance tuning.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they have implemented.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools like SAP Solution Manager to gain insights into system performance and resource usage.
  
  By following these steps, you should be able to diagnose and resolve the resource contention issue indicated by the error message /PRA/PN133.