Solution : https://service.sap.com/sap/support/notes/861215 (SAP Service marketplace login required)
Key words :
-xms2048m minimum heapsize -xmx2048m maximum heapsize -xmn400m min, -xms200m minimum heapsize -xmx200m maximum heapsize -xmn70m min, configtool'cluster-data'->'instance_idxxxxxxx'->'server_idxxxxxxxxx'-> general-xjvm, 'cluster-data'->'instance_idxxxxxxx'->'dispatcher_idxxxxxxxxx'-> general-xjvm, installing/upgrading sap webas 640/700 j2ee engine, significant native memory footprint reduction, unlimited strength jurisdiction policy files, prevent superfluous system gcs triggered, dispatcher showing high cpu load, high native memory usage
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