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Hadoop process swap memory

Hadoop process swap memory


Some of the Hadoop processes like YarnChild, DataNode, NodeManager are slightly using swap memory (10MB),  there is enough memory available (usage is only 20GB of 500GB, buff/cache 450GB), enough heap available for these processes.


CentOS 7, CDH enterprise 5.14.0,




When we run


echo 3 > /proc/sys/vm/drop_caches


its not swapping any more, again started swapping when buff/cache reached around 450GB


any suggestion? thanks



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