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/proc/sys/vm/overcommit_memoryaffects the kernel behaviour on low memory.overcommit_memoryspecial file uses RAM+SWAP as usable memory. I'm still gonna swap :)ulimitsare a bad idea as shown almost everywhere since it is a per process limitation... I fork you know :) Aboutcgroups, this is definitely better but lacks something more general: I'm talking about my laptop but I also own a "calculation" server that we are three to share. If I enforce such per user limits, I'll be limited by the worst case scenario, won't I?