On the QLogic card, increase the LUN queue depth according to your workload requirements. During our benchmarking, we used the queue value of 256.
For the ESXi host, change the power management policy to high performance.
Configure multipathing properly to have better performance and high availability for the paths between server and storage. We used VMware NMP technology for storage multipathing.
Select the native round-robin path policy.
Change the NMP round-robin path switching frequency for the XtremIO X2 array from the default of 1,000 to 1.
Use PVSCSI controllers when creating virtual disks on the datastore and assigning it to the VM.
Create distributed vSwitches to help with load balancing and high availability.
Assign vCPUs and memory within single physical NUMA nodes for the VM to achieve better utilization and performance of the VM.
Use VM vCPU and vMemory reservations for better performance predictability and reliability.
For high-performance workloads, avoid overprovisioning of memory and vCPUs. Keep ESXi overhead in mind while planning for VM deployment.
