How To Fix ICM604 - Amount of memory used in the ICM cache has exceeded the threshold value

SAP Error Message - Details

• Message type: E = Error

• Message class: ICM - Messages for ICM Monitor

• Message number: 604

• Message text: Amount of memory used in the ICM cache 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 ICM604 - Amount of memory used in the ICM cache has exceeded the threshold value ?

  The SAP error message ICM604 indicates that the amount of memory used in the Internet Communication Manager (ICM) cache has exceeded a predefined threshold value. This can lead to performance issues or even service interruptions if not addressed.
  Cause:
  
  High Traffic: A sudden increase in user requests or data being processed can lead to excessive memory usage.
  Configuration Settings: The cache size may be set too low for the current workload, or the threshold values may not be appropriately configured.
  Memory Leaks: There could be issues in the application or the ICM itself that are causing memory to not be released properly.
  Inefficient Caching Strategy: The caching strategy may not be optimal for the type of requests being processed.
  
  Solution:
  
  
  Increase Cache Size:
  
  You can increase the cache size in the ICM configuration. This can be done by adjusting the parameters in the instance profile or using transaction RZ10 to modify the profile parameters.
  Look for parameters like icm/HTTP/port and icm/HTTP/max_cache_size.
  
  
  
  Adjust Threshold Values:
  
  Review and adjust the threshold values for the cache. This can also be done in the instance profile.
  
  
  
  Monitor and Analyze Traffic:
  
  Use transaction ST03N or STAD to analyze the workload and identify any spikes in traffic or specific transactions that are consuming excessive resources.
  
  
  
  Check for Memory Leaks:
  
  Use transaction SM50 or SM66 to monitor the work processes and check for any that are consuming excessive memory.
  If you suspect a memory leak, consider applying relevant SAP Notes or patches that address known issues.
  
  
  
  Optimize Caching Strategy:
  
  Review the caching strategy and ensure that it aligns with the application’s needs. This may involve adjusting how data is cached or implementing more efficient caching mechanisms.
  
  
  
  Restart ICM:
  
  As a temporary measure, restarting the ICM can clear the cache and free up memory. However, this is not a long-term solution.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to ICM memory issues.
  Monitoring Tools: Utilize SAP monitoring tools like SAP Solution Manager or SAP EarlyWatch Alert to keep track of system performance and identify potential issues before they escalate.
  Documentation: Refer to the official SAP documentation for ICM configuration and performance tuning for more detailed instructions.
  
  Conclusion:
  Addressing the ICM604 error involves a combination of increasing memory allocation, adjusting configuration settings, monitoring system performance, and optimizing caching strategies. Regular monitoring and proactive management can help prevent this issue from recurring.