How To Fix CSM_VMC047 - Memory Size of the Shared Code Cache

SAP Error Message - Details

• Message type: E = Error

• Message class: CSM_VMC - Messages for VM Container Monitoring

• Message number: 047

• Message text: Memory Size of the Shared Code Cache

What causes this issue?

The shared code cache is the area of the shared pool containing the
machine code generated by the JIT compiler.
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_VMC047 - Memory Size of the Shared Code Cache ?

  The SAP error message CSM_VMC047 indicates that the memory size of the shared code cache has reached its limit. This can occur in environments where the Java Virtual Machine (JVM) is used, particularly in SAP NetWeaver systems that utilize Java applications.
  Cause:
  The error typically arises due to one or more of the following reasons:
  
  Insufficient Memory Allocation: The shared code cache is not allocated enough memory to handle the compiled code for the Java applications running on the server.
  High Load: A high number of requests or a large number of Java classes being loaded can lead to increased memory usage in the shared code cache.
  Memory Leaks: There may be memory leaks in the application code or libraries that are causing the shared code cache to fill up more quickly than expected.
  
  Solution:
  To resolve the CSM_VMC047 error, you can take the following steps:
  
  
  Increase Shared Code Cache Size:
  
  You can increase the size of the shared code cache by modifying the JVM parameters. This can typically be done in the SAP NetWeaver Administrator or by editing the instance profile.
  Look for the parameter -XX:SharedCodeCacheSize=<size> and increase its value. For example, you might set it to -XX:SharedCodeCacheSize=256m or higher, depending on your system's available resources.
  
  
  
  Monitor Memory Usage:
  
  Use monitoring tools to keep an eye on memory usage in your Java applications. This can help you identify if the memory is being used efficiently or if there are potential memory leaks.
  
  
  
  Optimize Code:
  
  Review the application code for any inefficiencies or potential memory leaks. Ensure that classes are being unloaded properly and that resources are being released when no longer needed.
  
  
  
  Restart the Application Server:
  
  In some cases, a simple restart of the application server can help clear the cache and free up memory.
  
  
  
  Review Application Load:
  
  If the application is under heavy load, consider scaling your infrastructure or optimizing the application to handle requests more efficiently.
  
  
  
  Related Information:
  
  JVM Parameters: Familiarize yourself with other JVM parameters that can affect memory management, such as -Xms, -Xmx, and -XX:MaxPermSize.
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to memory management in your version of SAP NetWeaver.
  Documentation: Refer to the official SAP documentation for best practices on configuring and tuning the JVM for SAP applications.
  
  By following these steps, you should be able to address the CSM_VMC047 error and improve the performance of your SAP Java applications.