How To Fix CSM_VMC037 - Maximale Häufigkeit der Full GCs einzelner Virtual Machines

SAP Error Message - Details

• Message type: E = Error

• Message class: CSM_VMC - Messages for VM Container Monitoring

• Message number: 037

• Message text: Maximale Häufigkeit der Full GCs einzelner Virtual Machines

Was verursacht dieses Problem?

Each of the active virtual machines in the VM Container has reserved
memory for its Java heap. The size of this memory is bound to specified
limits when the VM is started and cannot be changed at runtime. Once
this memory is used up, the VM activates the garbage collection (GC)
procedure, in which memory allocated but no longer needed is freed up
again.
There are two stages to this procedure - partial and full garbage
collection. The partial GC cleans up dedicated memory areas only and
uses much less resources. It is therefore much faster than the full GC.
This partial GC is performed more frequently and is part of normal
operation. The full GC is started when the permanent memory usage
(objects that have survived several partial GCs) exceeds specified
limits. Full GC empties all the objects from the Java heap that are no
longer needed, and therefore reduces the amount of memory occupied to
the smallest possible amount. This process involves a complex analysis
of the Java object references and takes a long time and uses up alot of
VM resources.

Systemantwort

This monitor displays the frequency of GC runs in the VM that shows the
biggest value during the cycle measured. This frequency of full GC runs
in the VM is a criterion for the state of memory usage in the VM. A
frequency of several full GCs per minute (10 and more) is an indication
that VM memory is running out and that VM performance may be severely
affected.
You can find more information in the online documentation under
<DS:KENO.001560AA0E081DEB91FE7CAB73A45918>Garbage Collection</>.

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