Advanced vSphere 5.5 Performance Tuning

This three-day course covers vSphere 5.5 performance topics, aimed at the VMware professional. It is intended to be an extreme deep dive course. We offer internal lab systems, however we strongly suggest attendees have remote access to their infrastructure; real-world examples are best.

This course is led by an IVOXY Consultant that specializes in performance tuning, with at least five (5) years of experience as a virtualization consultant.

Prerequisite:  Hands-on vSphere

Course Length: 2 days (8am – 5pm).

You’ll Learn:

ESXi Server Hardware

  • Suggested BIOS options
  • PCIe card placement
  • Power management
  • Memory options
  • Freeing interrupt resources


  • Memory management & overcommitment deep-dive
  • Hardware-accelerated memory vs binary translation
  • Memory concepts for ESXi & guest OSes
  • Right-sizing a VM’s memory
  • ESXi large pages & guest large pages

pCPU, vCPU & Hypervisor Scheduling

  • vCPU vs vCore
  • Running latency-senstive workloads
  • NUMA and vNUMA
  • pCPU power states and their effect on VM latency
  • Guest tuning for better CPU scheduling
  • Right-sizing a VM’s vCPU’s

Application-specific Topics

  • Data protection for tier 1 applications
  • Virtualizing Exchange
  • Virtualizing SQL Server
  • Virtualizing Oracle
  • Supported configurations by VMware
  • Supported configurations by Microsoft
  • Supported configurations by Oracle


  • How VAAI accelerates storage operations
  • iSCSI tuning in Windows VM’s
  • I/O coalescing in Linux guests
  • Performance characteristics of VMDK types
  • SATP, MPP & NMP: What they are & how they work
  • VMFS locking
  • NFS best practices
  • SIOC: How it works & when to use it
  • Offloading I/O to flash media
  • Fibre channel best practices for performance & availability
  • Hypervisor & guest storage queues
  • I/O characteristics of common workloads
  • Designing a SAN/NAS


  • ESXi interconnect options & best practices
  • Jumbo framing
  • Link aggregation concepts
  • Flow control concepts
  • pNIC/VMNIC performance tunables
  • Network tunables in the guest
  • Traffic segmentation
  • NIOC: How it works & when to use it
  • Hypervisor & guest network queues


  • Customizing DRS rebalancing
  • vMotion performance & migration considerations
  • Resource capacity planning
  • Resource pools: What, when & how
  • Behind the DRS algorithm
  • How the HA engine works

Performance Monitoring

  • Tools & utilities for monitoring vSphere health
  • Useful metrics & how to interpret them

Upcoming Trainings

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