How To Fix D4428 - SAP/OS400 extended memory management: Free resources-max. no. of elements

SAP Error Message - Details

• Message type: E = Error

• Message class: D4 - DB2/400 specific messages

• Message number: 428

• Message text: SAP/OS400 extended memory management: Free resources-max. no. of elements

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message D4428 - SAP/OS400 extended memory management: Free resources-max. no. of elements ?

  The SAP error message D4428, which pertains to "SAP/OS400 extended memory management: Free resources - max. no. of elements," typically indicates that the system has reached the maximum limit of free resources available for extended memory management. This can occur in environments running SAP on IBM iSeries (AS/400) systems.
  Cause:
  
  
  Memory Limitations: The error usually arises when the system has exhausted the available memory resources for extended memory management. This can happen due to:
  
  High memory consumption by running processes.
  Insufficient configuration of memory parameters.
  A large number of users or processes consuming memory simultaneously.
  
  
  
  Configuration Issues: The configuration settings for memory management may not be optimized for the workload, leading to resource exhaustion.
  
  
  System Load: A sudden increase in system load or a specific transaction that requires more memory than is available can trigger this error.
  
  
  Solution:
  
  
  Increase Memory Allocation:
  
  Review and adjust the memory settings in the SAP system profile parameters. You may need to increase the values for parameters related to extended memory, such as em/initial_size_MB and em/size_MB.
  Ensure that the IBM iSeries system has enough physical memory available to accommodate the increased settings.
  
  
  
  Monitor and Optimize Memory Usage:
  
  Use transaction codes like ST02 (Tune Summary) to monitor memory usage and identify any processes that are consuming excessive memory.
  Optimize the ABAP programs and background jobs to reduce memory consumption.
  
  
  
  Restart the System: In some cases, a system restart may help clear up memory fragmentation and free up resources.
  
  
  Check for Memory Leaks: Investigate if there are any memory leaks in custom programs or third-party add-ons that could be consuming memory unnecessarily.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may provide additional guidance or patches related to this error.
  
  
  System Upgrade: If the issue persists and is a recurring problem, consider upgrading the hardware or the SAP system to a version that better handles memory management.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on memory management and configuration settings.
  IBM iSeries Documentation: Consult IBM documentation for best practices on managing memory on the iSeries platform.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  
  By following these steps, you should be able to address the D4428 error and improve the memory management of your SAP system on the IBM iSeries platform.