Memory is a very finite resources actually. Pretty sure virtual memory and over allocation is a major issue with virtual machines and containerization nowadays.

Memory is a very finite resources actually. Pretty sure virtual memory and over allocation is a major issue with virtual machines and containerization nowadays. Software preempt huge amount of memory because it's assumed to be unlimited free virtual memory. Except the software is running within a container or an OS, within a virtual machine, on a physical machine, that's running another hundreds things like that more or less isolated from one another. While the application may be aware of what memory it's really using, the layers above may not be able to tell exactly what's used or sitting idle. It's a major challenge to estimate and distribute resources appropriately.