How To Fix CSM_VMC048 - Shared Code Cache Occupation

SAP Error Message - Details

• Message type: E = Error

• Message class: CSM_VMC - Messages for VM Container Monitoring

• Message number: 048

• Message text: Shared Code Cache Occupation

System Response

Percentage of the shared code cache (here the code is generated by the
JIT compiler) that is currently in use.
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</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CSM_VMC048 - Shared Code Cache Occupation ?

  The SAP error message CSM_VMC048, which indicates "Shared Code Cache Occupation," typically arises when the shared code cache in the SAP system is full or nearly full. This can lead to performance issues or even system instability if not addressed.
  Cause:
  
  Code Cache Full: The shared code cache is used to store compiled code for ABAP programs and other objects. If the cache is full, the system cannot load new code into it.
  High Load: A high number of concurrent users or processes can lead to increased demand for code cache space.
  Inefficient Code: Poorly optimized ABAP code or excessive use of dynamic programming can lead to increased cache usage.
  Configuration Issues: Incorrect configuration settings for the code cache size can lead to premature filling of the cache.
  
  Solution:
  
  
  Increase Code Cache Size:
  
  You can increase the size of the shared code cache by adjusting the profile parameters. The relevant parameters are:
  
  abap/heap_area_total
  abap/heap_area_dia
  abap/heap_area_nondia
  
  
  These parameters can be modified in the instance profile and require a restart of the SAP instance to take effect.
  
  
  
  Monitor and Optimize Code:
  
  Use transaction codes like ST05 (SQL Trace) and SE30 (Runtime Analysis) to identify and optimize inefficient ABAP code.
  Review the usage of dynamic programming and consider refactoring where possible.
  
  
  
  Clear Code Cache:
  
  In some cases, you may need to clear the code cache. This can be done by restarting the application server, which will clear the cache and allow it to rebuild.
  
  
  
  Check for Updates:
  
  Ensure that your SAP system is up to date with the latest support packages and patches, as these may contain optimizations and fixes related to code cache management.
  
  
  
  Review System Load:
  
  Analyze the system load and user activity. If the system is consistently under heavy load, consider scaling up your infrastructure or optimizing user access patterns.
  
  
  
  Related Information:
  
  Monitoring Tools: Use transaction codes like ST02 (Tune Summary) to monitor the memory usage and performance of the code cache.
  SAP Notes: Check SAP Notes related to CSM_VMC048 for specific recommendations or patches that may address the issue.
  Documentation: Refer to the SAP Help Portal for detailed documentation on memory management and performance tuning in SAP systems.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the impact of the CSM_VMC048 error and improve the performance of your SAP system.