Problem Statement
In a virtualised environment what does resource over-commit mean?
Explanation
Resource over-commit means that the hypervisor or virtualisation platform allows virtual machines collectively to hold more CPUs, RAM or storage allocations than the underlying physical host provides, relying on the fact that not all VMs will use their maximum at the same time. This improves utilisation but also introduces risk of contention and performance degradation. Knowing this risk-vs-benefit is useful in interviews.
