How To Fix D4400 - Summary:SAP/OS400 memory management - roll management resources

SAP Error Message - Details

• Message type: E = Error

• Message class: D4 - DB2/400 specific messages

• Message number: 400

• Message text: Summary:SAP/OS400 memory management - roll management resources

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message D4400 - Summary:SAP/OS400 memory management - roll management resources ?

  The SAP error message D4400, which relates to memory management and roll management resources in the context of SAP on the OS/400 platform, typically indicates that the system is running low on memory resources required for managing roll areas. Roll areas are used in SAP to store data that cannot fit into the main memory, and when these resources are exhausted, it can lead to performance issues or system errors.
  Cause:
  
  Insufficient Memory Allocation: The system may not have enough memory allocated for roll management, which can happen if the configuration settings are not optimized for the workload.
  High Workload: An increase in the number of users or transactions can lead to higher memory consumption, resulting in the exhaustion of roll area resources.
  Configuration Issues: Incorrect settings in the SAP profile parameters related to memory management can lead to inadequate roll area allocation.
  Memory Leaks: There may be issues in the application or system that cause memory to not be released properly, leading to exhaustion over time.
  
  Solution:
  
  
  Increase Roll Area Size: Adjust the SAP profile parameters to increase the size of the roll area. The parameters to look for include:
  
  rdisp/roll_area
  rdisp/roll_max
  rdisp/roll_size
  
  You can modify these parameters in the instance profile and restart the SAP instance for the changes to take effect.
  
  
  Monitor Memory Usage: Use transaction codes like ST02 (Tune Summary) and ST03 (Workload Analysis) to monitor memory usage and identify any bottlenecks or high consumption areas.
  
  
  Optimize Workload: If possible, reduce the number of concurrent users or transactions during peak times to alleviate memory pressure.
  
  
  Check for Memory Leaks: Investigate the application for any potential memory leaks. This may involve reviewing custom code or third-party add-ons that could be consuming excessive memory.
  
  
  System Upgrade: If the hardware is outdated or insufficient for the current workload, consider upgrading the system resources (RAM, CPU) to better handle the demands.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may provide additional guidance or patches related to memory management issues.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on memory management and configuration settings.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Performance Tuning: Consider performance tuning best practices for SAP systems, which can help in optimizing memory usage and overall system performance.
  
  By addressing the underlying causes and implementing the suggested solutions, you should be able to resolve the D4400 error and improve the memory management of your SAP system on OS/400.