Performance Best Practices for VMware vSphere 6.7 Update 2
4 VMware, Inc.
2MB Large Memory Pages 35
ESXi Storage Considerations 37
vSphere Flash Read Cache (vFRC) 37
VMware vStorage APIs for Array Integration (VAAI) 37
LUN Access Methods 37
Virtual Disk Modes 38
Virtual Disk Types 38
Automatic Space Reclamation (UNMAP) 39
Partition Alignment 39
SAN Multipathing 40
Storage I/O Resource Allocation 41
iSCSI and NFS Recommendations 41
NVMe Recommendations 41
vSphere Virtual Machine Encryption Recommendations 42
General ESXi Storage Recommendations 42
Running Storage Latency Sensitive Workloads 43
ESXi Networking Considerations 44
General ESXi Networking Considerations 44
Network I/O Control (NetIOC) 44
Network I/O Control Configuration 44
Network I/O Control Advanced Performance Options 45
DirectPath I/O 45
Single Root I/O Virtualization (SR-IOV) 45
SplitRx Mode 46
Disabling SplitRx Mode for an Entire ESXi Host 46
Enabling or Disabling SplitRx Mode for an Individual Virtual NIC 46
Receive Side Scaling (RSS) 47
Virtual Network Interrupt Coalescing 47
Running Network Latency Sensitive Workloads 48
Host-Wide Performance Tuning 50
3 Guest Operating Systems 51
Guest Operating System General Considerations 51
Microsoft Virtualization-Based Security (VBS) 52
Measuring Performance in Virtual Machines 52
Guest Operating System CPU Considerations 53
Side-Channel Vulnerability Mitigation in Guest Operating Systems 53
Virtual NUMA (vNUMA) 53
Guest Operating System Memory Considerations 55
Guest Operating System Storage Considerations 56
Guest Operating System Networking Considerations 57
Types of Virtual Network Adapters 57
Selecting Virtual Network Adapters 58
Virtual Network Adapter Features and Configuration 58
4 Virtual Infrastructure Management 61
General Resource Management 61
VMware vCenter 62
VMware vCenter Database Considerations 63
VMware vCenter Database Network and Storage Considerations 63
VMware vCenter Database Configuration and Maintenance 63
Recommendations for Specific Database Vendors 64
VMware vSphere Management 66
vSphere Clients 66
vSphere Client Back-End Performance Considerations 66
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