How To Fix D3759 - Number of pages moved to expanded storage

SAP Error Message - Details

• Message type: E = Error

• Message class: D3 - CCMS - DB2 on OS390

• Message number: 759

• Message text: Number of pages moved to expanded storage

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 D3759 - Number of pages moved to expanded storage ?

  The SAP error message D3759, which states "Number of pages moved to expanded storage," typically indicates that the SAP system is experiencing memory management issues, specifically related to the use of expanded storage (also known as extended storage). This can occur when the system is running low on available memory resources, leading to the need to move data to expanded storage to free up space.
  Cause:
  
  Insufficient Memory Allocation: The SAP system may not have enough memory allocated to handle the current workload, leading to the need for expanded storage.
  High Workload: A sudden increase in user activity or background jobs can lead to memory exhaustion.
  Configuration Issues: Incorrect configuration settings for memory management in the SAP system can lead to inefficient memory usage.
  Memory Leaks: Certain programs or transactions may not be releasing memory properly, causing the system to run out of available memory.
  
  Solution:
  
  Increase Memory Allocation: Review and increase the memory settings for the SAP instance. This can be done in the instance profile parameters (e.g., abap/heap_area_total, abap/heap_area_dia, etc.).
  Monitor System Performance: Use transaction codes like ST02 (Tune Summary) and ST03 (Workload Analysis) to monitor memory usage and identify any bottlenecks or high memory-consuming processes.
  Optimize Programs: Review custom programs or transactions that may be consuming excessive memory and optimize them if necessary.
  Adjust Configuration: Ensure that the SAP system is configured correctly for memory management. This includes checking parameters related to extended memory and paging.
  Review Background Jobs: Check for any long-running or resource-intensive background jobs that may be consuming memory and adjust their scheduling or resource allocation.
  Upgrade Hardware: If the system consistently runs out of memory, consider upgrading the server hardware to provide more RAM.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to memory management and performance tuning for specific recommendations and best practices.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  Documentation: Review SAP documentation on memory management and performance tuning for detailed guidelines on configuring and optimizing memory settings.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the occurrence of the D3759 error and improve the overall performance of your SAP system.