How To Fix CSM_VMC066 - Maximum Frequency of GC Runs of Individual Virtual Machines

SAP Error Message - Details

• Message type: E = Error

• Message class: CSM_VMC - Messages for VM Container Monitoring

• Message number: 066

• Message text: Maximum Frequency of GC Runs of Individual Virtual Machines

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CSM_VMC066 - Maximum Frequency of GC Runs of Individual Virtual Machines ?

  The SAP error message CSM_VMC066, which indicates "Maximum Frequency of GC Runs of Individual Virtual Machines," typically relates to the garbage collection (GC) process in the context of SAP's Java Virtual Machine (JVM). This error suggests that the frequency of garbage collection runs for individual virtual machines has exceeded a predefined limit, which can lead to performance issues.
  Cause:
  
  High Memory Usage: The application may be consuming a large amount of memory, leading to frequent garbage collection cycles.
  Inefficient Memory Management: Poorly optimized code or memory leaks can cause the JVM to trigger garbage collection more often than necessary.
  Configuration Limits: The JVM may have specific configuration settings that limit the frequency of garbage collection, and these limits may be reached due to high memory pressure.
  Resource Constraints: Insufficient system resources (CPU, memory) can exacerbate the frequency of garbage collection.
  
  Solution:
  
  
  Analyze Memory Usage:
  
  Use monitoring tools (like SAP Solution Manager, JVisualVM, or other APM tools) to analyze memory usage patterns and identify memory leaks or inefficient memory usage in the application.
  
  
  
  Optimize Code:
  
  Review and optimize the application code to reduce memory consumption. This may involve optimizing data structures, reducing object creation, and ensuring proper resource management.
  
  
  
  Adjust JVM Parameters:
  
  Modify the JVM parameters related to garbage collection. For example, you can adjust the heap size settings (-Xms and -Xmx) to provide more memory to the JVM, or tweak garbage collection settings to use a different GC algorithm that may be more efficient for your workload.
  Example parameters to consider:
  
  -XX:MaxGCPauseMillis to set a target for maximum GC pause time.
  -XX:GCTimeRatio to control the ratio of time spent in GC versus application execution.
  
  
  
  
  
  Increase Resources:
  
  If the application is running on a virtual machine, consider increasing the allocated resources (CPU, memory) to handle the workload more effectively.
  
  
  
  Review GC Logs:
  
  Enable and review garbage collection logs to gain insights into the frequency and duration of GC events. This can help identify patterns and inform tuning decisions.
  
  
  
  Upgrade SAP and JVM:
  
  Ensure that you are using the latest version of SAP and the JVM, as newer versions may include performance improvements and better garbage collection algorithms.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to this error message.
  Documentation: Refer to the official SAP documentation for guidelines on JVM tuning and performance optimization.
  Community Forums: Engage with SAP community forums or support channels for additional insights and shared experiences from other users facing similar issues.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the frequency of garbage collection runs and improve the overall performance of your SAP application.