How To Fix UKM051 - Maximum number of buffer entries reached

SAP Error Message - Details

• Message type: E = Error

• Message class: UKM - UKM Message Class

• Message number: 051

• Message text: Maximum number of buffer entries reached

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UKM051 - Maximum number of buffer entries reached ?

  The SAP error message UKM051: Maximum number of buffer entries reached typically occurs in the context of the SAP system's buffer management, particularly related to the UKM (Universal Key Management) component. This error indicates that the system has reached the maximum limit of entries that can be stored in a specific buffer, which can lead to performance issues or the inability to process further requests.
  Causes:
  
  Buffer Limit Reached: The most common cause is that the buffer for storing certain entries (like keys or data) has reached its maximum capacity.
  Configuration Settings: The buffer size may be set too low in the system configuration, leading to frequent overflow.
  High Volume of Transactions: A sudden increase in the number of transactions or data entries being processed can lead to the buffer being filled quickly.
  Inefficient Data Management: Poor data management practices, such as not clearing old or unnecessary entries, can contribute to buffer overflow.
  
  Solutions:
  
  
  Increase Buffer Size: 
  
  You can increase the buffer size in the system configuration settings. This typically involves adjusting parameters in the SAP system profile or specific configuration settings related to UKM.
  Consult with your SAP Basis team or system administrator to make these changes.
  
  
  
  Clear Buffer Entries: 
  
  Regularly clear out old or unnecessary entries from the buffer to free up space. This can often be done through specific transaction codes or background jobs designed for buffer management.
  
  
  
  Monitor Buffer Usage: 
  
  Implement monitoring tools or reports to keep track of buffer usage and identify patterns that lead to overflow. This can help in proactive management of buffer sizes.
  
  
  
  Optimize Data Processing: 
  
  Review and optimize the processes that are generating a high volume of entries. This may involve streamlining transactions or improving data handling practices.
  
  
  
  Consult SAP Documentation: 
  
  Refer to SAP Notes or documentation related to UKM and buffer management for specific recommendations and best practices.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes that can help in monitoring and managing buffers, such as SM12 (for lock entries) or SM21 (for system logs).
  SAP Notes: Check for any SAP Notes related to UKM051 for additional insights or patches that may address the issue.
  Performance Tuning: Consider engaging in performance tuning activities to ensure that the system is running efficiently and that buffers are managed effectively.
  
  If the problem persists after trying the above solutions, it may be beneficial to engage SAP support for further assistance.