Is rightsizing VMs required in vSphere due to automatic resource adjustment?

Rightsizing VMs is not required in vSphere due to automatic resource adjustment capabilities available in the platform. vSphere includes features such as Distributed Resource Scheduler (DRS) and Resource Pools that help manage and optimize resource allocation among virtual machines. These features allow for dynamic allocation and adjustment of CPU and memory resources based on the workload, ensuring that VMs use resources efficiently without the need for manual rightsizing.

The ability of vSphere to automatically adjust resources means that as workloads change, the requirements for VM resources can be dynamically managed. This reduces the burden on administrators to manually resize VMs frequently and allows for a more adaptive and responsive infrastructure. Thus, while rightsizing can still be beneficial for optimizing performance or efficiency, it is not a strict requirement due to the presence of automated resource management tools within the vSphere ecosystem.