Which means in a practice “infinity” is a lot lower than 2^64, although exactly how much lower depends on system configuration (how much memory the system has, how much of it this process is permitted to consume)
> The point is that the limit should be determined by physical limitations of the hardware, not an arbitrary number chosen by the programmer.
A machine might have 64GB of RAM, but this application might be configured to be allowed to consume a maximum of 4GB of it. In which case, the limit isn’t being determined by the physical limitations of the hardware; whether or not it is under the control of the programmer depends on who does what. Some programmers get to decide how much memory to allocate to their program, for others that decision is made by somebody else.
