Sort VMs by CPU Usage: Use vSphere or 3rd party monitoring tools to identify which VMs are consuming the most CPU.Check CPU Ready Times: High ready times indicate contention and scheduling delays.Review Storage and Network Performance: Investigate storage latency, path errors, and network traffic for bottlenecks.Monitor Host and Cluster Metrics: Look for patterns in CPU usage, utilization, and alert thresholds across hosts.Audit Recent Changes: Consider recent upgrades, configuration changes, or storage modifications that may coincide with CPU spikes., High CPU utilization in ESXi hosts can result from a variety of factors, both at the host and virtual machine (VM) level. Common Causes of High CPU Utilization in ESXi Hosts include: 1. VM Workload and Overprovisioning Running too many VMs or allocating more vCPUs than the physical CPUs (pCPUs) available can lead to high CPU contention. For example, if multiple VMs simultaneously demand high , vCenter server is a service that acts as a central administrator for ESXi hosts connected in a network. vCenter Server lets you pool and manage the resources of multiple hosts. More about vSphere, which finally is just the brand name and umbrella term for VMware’s suite of virtualization products and features, basically the ESXi hypervisor and vCenter Server, you will find in my following .