How To Fix RT884 - Current size of Extended global memory [KB]

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 884

• Message text: Current size of Extended global memory [KB]

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RT884 - Current size of Extended global memory [KB] ?

  The SAP error message RT884 indicates that the current size of the extended global memory (EGM) has reached its limit. This can occur in SAP systems when the memory allocation for the extended global memory exceeds the configured limits, which can lead to performance issues or system instability.
  Cause:
  
  Memory Configuration: The extended global memory is configured with a specific limit, and if the applications or processes running in the SAP system require more memory than allocated, this error can occur.
  High Load: A sudden increase in workload or inefficient memory usage by certain transactions or programs can lead to excessive memory consumption.
  Memory Leaks: Some custom programs or poorly optimized code may not release memory properly, leading to increased memory usage over time.
  Insufficient Hardware Resources: The underlying hardware may not have enough physical memory to support the demands of the SAP applications.
  
  Solution:
  
  
  Increase Extended Global Memory:
  
  You can increase the size of the extended global memory in the SAP profile parameters. The parameter to adjust is typically em/initial_size_MB or em/max_size_MB.
  To change these parameters, you will need to access the instance profile of your SAP system and modify the values accordingly. After making changes, restart the SAP instance for the changes to take effect.
  
  
  
  Optimize Memory Usage:
  
  Review and optimize custom programs and transactions that may be consuming excessive memory.
  Use transaction ST02 (Tune Summary) to analyze memory usage and identify any bottlenecks or areas for improvement.
  
  
  
  Monitor System Performance:
  
  Regularly monitor the system performance using tools like transaction ST03 (Workload Analysis) and ST04 (Database Performance).
  Set up alerts for memory usage to proactively manage memory allocation.
  
  
  
  Check for Memory Leaks:
  
  Investigate any custom code or third-party add-ons that may be causing memory leaks. Use transaction ST22 (Dump Analysis) to check for short dumps related to memory issues.
  
  
  
  Hardware Upgrade:
  
  If the system consistently runs out of memory, consider upgrading the hardware to provide more physical memory to the SAP system.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to memory management and performance tuning for specific recommendations and best practices.
  SAP Documentation: Refer to the official SAP documentation for guidelines on configuring memory parameters and understanding memory management in SAP systems.
  SAP Community: Engage with the SAP Community forums for insights and experiences shared by other SAP users facing similar issues.
  
  By addressing the root causes and implementing the suggested solutions, you can mitigate the RT884 error and improve the overall performance of your SAP system.