How To Fix RT429 - Maxmimum paging area load [KB] since system start

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 429

• Message text: Maxmimum paging area load [KB] since system start

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 RT429 - Maxmimum paging area load [KB] since system start ?

  The SAP error message RT429, which indicates "Maximum paging area load [KB] since system start," is related to memory management within the SAP system. This error typically arises when the paging area load exceeds a predefined threshold, which can lead to performance issues or system instability.
  Cause:
  
  
  High Memory Usage: The system is consuming a significant amount of memory, leading to increased paging activity. This can occur due to:
  
  Inefficient ABAP programs or transactions that consume excessive memory.
  Large data sets being processed.
  Insufficient physical memory allocated to the SAP instance.
  
  
  
  Configuration Issues: The SAP system may not be optimally configured for the workload it is handling, leading to excessive paging.
  
  
  System Resource Limitations: The underlying operating system may have limitations on memory usage or paging that affect the SAP system.
  
  
  Solution:
  
  
  Monitor Memory Usage: Use transaction codes like ST02 (Tune Summary) and ST03 (Workload Analysis) to monitor memory usage and identify any programs or transactions that are consuming excessive resources.
  
  
  Optimize ABAP Programs: Review and optimize any custom ABAP programs that may be causing high memory consumption. This can include:
  
  Reducing the size of internal tables.
  Avoiding unnecessary data retrieval.
  Implementing efficient algorithms.
  
  
  
  Increase Physical Memory: If the server has insufficient physical memory, consider upgrading the hardware to provide more RAM.
  
  
  Adjust SAP Parameters: Review and adjust SAP memory parameters in the instance profile (e.g., abap/heap_area_total, abap/heap_area_dia, abap/heap_area_nondia) to better allocate memory resources.
  
  
  Check Operating System Settings: Ensure that the operating system is configured to handle the memory requirements of the SAP system. This may involve adjusting kernel parameters or system limits.
  
  
  Restart the SAP Instance: If the paging area load is excessively high and cannot be resolved through optimization, a restart of the SAP instance may temporarily alleviate the issue.
  
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may provide additional guidance or patches related to memory management and performance tuning.
  SAP Community: Engage with the SAP Community forums for insights and shared experiences from other users who may have encountered similar issues.
  Documentation: Refer to SAP documentation on memory management and performance tuning for best practices and recommendations.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the RT429 error and improve the overall performance of your SAP system.