It is important to ensure the maximum queue depth of the HBA is configured to meet the manufacturer and VMware recommendations, which may dependant on the combination of ESXi version and the HBA model and version. For QLogic HBAs, the default queue depth values are configured as below:         To view a … More VMware vSphere Performance – Part Four: Optimizing ESXi Host Storage

In order to support ESXi on a host system you require a minimum of two CPU cores, but ultimately need to ensure that your host has sufficient CPU resources in order to satisfy CPU demand of the virtual machines and VMkernal. It is also recommended to use CPUs that leverage hardware assisted virtualization as the performance … More VMware vSphere Performance – Part Three: Optimizing ESXi Host CPU

An ESXi host system requires a minimum of one network interface card (NIC), for redundancy a host system should be configured with a minimum of at least two NICs in order to satisfy VMkernal and virtual machine demand. For virtual machine communication on a host , these tasks will consume CPU resources and there for … More VMware vSphere Performance – Part Two: Optimizing ESXi Host Networking

Once you have have assessed the hardware requirements for ESXi host systems (requires a minimum of 2GB to install) to ensure sufficient memory resources are provided to satisfy the demand of the virtual machines, system overhead and the level of failure protection required, we shall look at various options for optimising ESXi host system memory. … More VMware vSphere Performance – Part One: Optimizing ESXi Host Memory