ps VSZ RSS

http://www.linuxquestions.org/questions/linux-hardware-18/why-is-vsz-more-than-rss-in-ps-aux-even-if-im-not-using-any-swap-663109/

RSS:

Residentsetsize=thenon-swappedphysicalmemorythatataskhasused;ResidentSetcurrentlyinphysicalmemoryincludingCode,Data,Stack

VSZ:

Virtualmemoryusageofentireprocess=VmLib+VmExe+VmData+VmStk

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