How To Fix ICM603 - Number of used MPI buffers has exceeded the threshold value

SAP Error Message - Details

• Message type: E = Error

• Message class: ICM - Messages for ICM Monitor

• Message number: 603

• Message text: Number of used MPI buffers has exceeded the threshold value

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ICM603 - Number of used MPI buffers has exceeded the threshold value ?

  The SAP error message ICM603 indicates that the number of used MPI (Message Passing Interface) buffers has exceeded a predefined threshold value. This typically occurs in the context of the Internet Communication Manager (ICM) in SAP systems, which handles HTTP requests and responses.
  Cause:
  
  High Load: The system is experiencing a high volume of requests, leading to an increased number of MPI buffers being utilized.
  Configuration Issues: The threshold for MPI buffers may be set too low for the current workload.
  Memory Leaks: There could be an underlying issue in the application or configuration that is causing memory leaks, leading to excessive buffer usage.
  Inefficient Code: Poorly optimized code or inefficient handling of requests can lead to excessive use of MPI buffers.
  
  Solution:
  
  
  Increase MPI Buffer Threshold:
  
  You can increase the threshold value for MPI buffers in the ICM configuration. This can be done by adjusting the parameter icm/HTTP/mpi_buffer_size in the SAP profile.
  Example: You can set it to a higher value based on your system's capacity and expected load.
  
  
  
  Monitor System Load:
  
  Use transaction codes like SM50 or SM66 to monitor the system's workload and identify any processes that are consuming excessive resources.
  Analyze the workload and consider load balancing or scaling up resources if necessary.
  
  
  
  Optimize Code:
  
  Review the application code for inefficiencies that may lead to excessive buffer usage. Optimize any long-running or resource-intensive processes.
  
  
  
  Check for Memory Leaks:
  
  Use tools like the SAP Memory Inspector or transaction ST02 to check for memory leaks and address them accordingly.
  
  
  
  Restart ICM:
  
  As a temporary measure, restarting the ICM can help clear the buffers and alleviate the issue, but this is not a long-term solution.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  
  
  Related Information:
  
  ICM Configuration: Familiarize yourself with the ICM parameters and their impact on performance. The ICM documentation can provide insights into optimal settings.
  Performance Tuning: Regularly monitor and tune the performance of your SAP system to prevent such issues from occurring in the future.
  SAP Community: Engage with the SAP Community forums for discussions and solutions shared by other SAP professionals who may have encountered similar issues.
  
  By addressing the underlying causes and optimizing the configuration, you can mitigate the occurrence of the ICM603 error and improve the overall performance of your SAP system.