A bully VM is a VM that consumes too many resources and causes other VMs to starve. A bully VM can affect the performance and availability of other VMs on the same host or cluster by hogging CPU, memory, disk, or network resources. A bully VM can be identified by using the VM Profile feature in Prism Central2.
The VM Profile feature analyzes the resource utilization of each VM and assigns it a profile based on its efficiency and impact on other VMs. The profiles are as follows3:
* Efficient: The VM is well-provisioned and has optimal resource utilization.
* Over-provisioned: The VM has more resources than it needs and has low resource utilization.
* Constrained: The VM has less resources than it needs and has high resource utilization.
* Inactive: The VM has no resource utilization and is idle or powered off.
* Bully: The VM has high resource utilization and causes contention for other VMs.
To identify a bully VM, the administrator can use Prism Central to view the VM Profile dashboard and filter by profile type. The dashboard shows the number of VMs in each profile type, as well as their resource consumption and efficiency score. The administrator can also drill down into each VM to see its detailed metrics and recommendations for optimization.