Solution : https://service.sap.com/sap/support/notes/1726170 (SAP Service marketplace login required)
Key words : 
command line option -xx, detect synchronization issues related, subsequent monitor-related operations, improves uncontended synchronization performance, symptom sap jvm 4, jit compiler kicks, collect profiling data, aggressively optimized based, collected profiling data, synchronized method invocation
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