How To Fix CSM_VMC071 - Average Effective CPU Usage for Garbage Collection of VMs as a Percentage

SAP Error Message - Details

• Message type: E = Error

• Message class: CSM_VMC - Messages for VM Container Monitoring

• Message number: 071

• Message text: Average Effective CPU Usage for Garbage Collection of VMs as a Percentage

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CSM_VMC071 - Average Effective CPU Usage for Garbage Collection of VMs as a Percentage ?

  The SAP error message CSM_VMC071, which refers to "Average Effective CPU Usage for Garbage Collection of VMs as a Percentage," typically indicates that there is an issue related to the performance of the Java Virtual Machine (JVM) garbage collection process. This can affect the overall performance of SAP applications running on the JVM.
  Cause:
  
  
  High Garbage Collection Overhead: The JVM is spending too much time performing garbage collection, which can lead to performance degradation. This can happen if:
  
  The heap size is too small for the workload.
  There are memory leaks in the application.
  The application is creating too many temporary objects.
  The garbage collection algorithm is not suitable for the workload.
  
  
  
  Insufficient Resources: The underlying hardware may not have enough CPU or memory resources to handle the workload efficiently.
  
  
  Configuration Issues: Incorrect JVM parameters or settings can lead to inefficient garbage collection.
  
  
  Solution:
  
  
  Monitor and Analyze: Use monitoring tools to analyze the JVM performance and garbage collection logs. Look for patterns in garbage collection times and frequency.
  
  
  Adjust Heap Size: Increase the heap size allocated to the JVM. This can reduce the frequency of garbage collection cycles. You can adjust the -Xms (initial heap size) and -Xmx (maximum heap size) parameters.
  
  
  Optimize Garbage Collection Settings: Depending on the version of the JVM you are using, consider tuning garbage collection settings. For example, you might switch to a different garbage collector (e.g., G1GC, CMS) that is better suited for your application’s workload.
  
  
  Code Optimization: Review the application code for memory leaks or excessive object creation. Optimize the code to reduce the number of temporary objects created during execution.
  
  
  Resource Allocation: Ensure that the server has adequate CPU and memory resources. If necessary, consider scaling up the hardware or moving to a more powerful server.
  
  
  Regular Maintenance: Regularly perform maintenance tasks such as clearing caches, optimizing database queries, and ensuring that the application is up to date with the latest patches and updates.
  
  
  Related Information:
  
  JVM Monitoring Tools: Tools like VisualVM, JConsole, or SAP's own monitoring tools can help you visualize and analyze JVM performance.
  Garbage Collection Logs: Enable detailed garbage collection logging to get insights into how often garbage collection is occurring and how long it takes.
  SAP Notes: Check SAP Notes and Knowledge Base Articles for specific recommendations related to your version of SAP and the JVM being used.
  Documentation: Refer to the official documentation for the JVM you are using for best practices on memory management and garbage collection tuning.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the impact of the CSM_VMC071 error and improve the performance of your SAP applications.