Informations about namenode_heapsize are in documentation: http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.0/bk_installing_manually_book/content/determine-hdp-memory-config.html http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.0/bk_installing_manually_book/content/ref-80953924-1cbf-4655-9953-1e744290a6c3.1.html ... View more