How To Fix CSM_VMC057 - Fragmentation of Memory Area for Shared Classes

CSM_VMC057 - Overview

• Message type: E = Error

• Message class: CSM_VMC - Messages for VM Container Monitoring

• Message number: 057

• Message text: Fragmentation of Memory Area for Shared Classes

What causes this issue?

Fragmentation of a shared memory area specifies the size of the
discrepancy between occupied and allocated memory for this area. Since
shared memory is reserved in blocks of equal size (allocated), in
certain situations, a large amount of memory may have been allocated,
but the individual blocks contain only a few objects, and for this
reason they cannot be released. This situation is known as large
fragmentation. The memory fragmentation is specified as a percentage.
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_VMC057 - Fragmentation of Memory Area for Shared Classes ?

  The SAP error message CSM_VMC057, which indicates "Fragmentation of Memory Area for Shared Classes," typically arises in the context of Java applications running on the SAP NetWeaver Application Server Java (AS Java). This error is related to memory management, specifically the fragmentation of the memory area allocated for shared classes in the Java Virtual Machine (JVM).
  
  Cause:
  
  Memory Fragmentation: Over time, as objects are created and destroyed, the memory can become fragmented. This means that there are many small, unused blocks of memory that cannot be utilized effectively for larger objects.
  Insufficient Memory Allocation: If the JVM is not allocated enough memory for shared classes, it can lead to fragmentation issues.
  High Load or Inefficient Code: Applications that have high memory usage or inefficient memory management practices can exacerbate fragmentation issues.
  
  
  Solution:
  
  
  Increase Memory Allocation:
  
  Adjust the JVM parameters to increase the memory allocated for shared classes. This can be done by modifying the -XX:MaxPermSize or -XX:ReservedCodeCacheSize