Hi Markus,
Here's what Oracle's documentation has to say:
The ConsumeHeap fills up the Java heap and runs out of memory. Whenjava.lang.OutOfMemoryError is thrown, a heap dump file is created. In this case the file is 507MB and is created as java_pid2262.hprof in the current directory.
By default the heap dump is created in a file called java_pidpid.hprof in the working directory of the VM, as in the example above. You can specify an alternative file name or directory with the -XX:HeapDumpPath= option. For example -XX:HeapDumpPath=/disk2/dumps will cause the heap dump to be generated in the /disk2/dumps directory.
Hope this will clear your issue 