I think this is due to memory overcommitting on Linux. It can actually be turned off. https://stackoverflow.com/questions/19750796/allocating-more-memory-than-

I think this is due to memory overcommitting on Linux. It can actually be turned off. https://stackoverflow.com/questions/19750796/allocating-more-memory-than-there-exists-using-malloc#19750809 https://stackoverflow.com/questions/19750796/allocating-more... But I like that about FreeBSD, it just says no when you try to allocate more memory than you have (including swap!)