How To Fix CSM_VMC102 - Average relative occupancy of the shared pool after shared GC run

SAP Error Message - Details

• Message type: E = Error

• Message class: CSM_VMC - Messages for VM Container Monitoring

• Message number: 102

• Message text: Average relative occupancy of the shared pool after shared GC run

What causes this issue?

You can see what percentage on average of the shared pool was occupied
(in the current monitoring cycle).
Big differences between the maximum and average occupation indicates big
fluctuations in the utilization of the shared memory.
You can find more information about the memory classes in the VM
Container in the online documentation under
<DS:KENO.001560AA0E081DEB91E241270609CAF7>Memory Management in the VM
Container</>.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CSM_VMC102 - Average relative occupancy of the shared pool after shared GC run ?

  The SAP error message CSM_VMC102 indicates an issue related to the average relative occupancy of the shared memory pool after a garbage collection (GC) run in the context of the SAP Java Virtual Machine (JVM). This message is typically associated with performance issues in the SAP system, particularly when it comes to memory management.
  Cause:
  The error message CSM_VMC102 is triggered when the average relative occupancy of the shared pool is higher than expected after a garbage collection cycle. This can occur due to several reasons:
  
  Memory Leaks: There may be memory leaks in the application, causing the shared memory pool to fill up over time without being properly released.
  Insufficient Memory Allocation: The shared memory pool may not have been allocated enough memory to handle the workload, leading to high occupancy levels.
  Inefficient Garbage Collection: The garbage collection process may not be effectively reclaiming memory, possibly due to configuration issues or the nature of the objects being managed.
  High Load: An increase in the number of users or transactions can lead to higher memory usage, which may not be adequately managed by the current configuration.
  
  Solution:
  To address the CSM_VMC102 error, consider the following steps:
  
  Analyze Memory Usage: Use monitoring tools to analyze memory usage patterns in the SAP system. Look for memory leaks or objects that are not being released.
  Adjust JVM Parameters: Review and adjust the JVM parameters related to memory allocation. This may include increasing the size of the shared memory pool or tuning garbage collection settings.
  Optimize Application Code: Review the application code for potential memory leaks or inefficient memory usage patterns. Optimize the code to ensure that objects are released when no longer needed.
  Update SAP Notes: Check for any relevant SAP Notes that may address known issues related to memory management and garbage collection in your version of SAP.
  Regular Maintenance: Implement regular maintenance tasks, such as periodic restarts of the application server, to help manage memory usage effectively.
  Consult SAP Support: If the issue persists, consider reaching out to SAP Support for further assistance. They may provide specific recommendations based on your system configuration and usage patterns.
  
  Related Information:
  
  Garbage Collection Tuning: Familiarize yourself with garbage collection tuning options available in the SAP JVM. This includes understanding different garbage collection algorithms and their configurations.
  SAP Memory Management: Review SAP documentation on memory management best practices, including how to monitor and optimize memory usage in SAP systems.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools, such as the SAP Solution Manager, to gain insights into system performance and memory usage.
  
  By following these steps and recommendations, you should be able to address the CSM_VMC102 error and improve the memory management of your SAP system.