6.5.1

Table Of Contents
Reduce Memory Overhead for Virtual Machines with 3D
Graphics Option
Virtual machines with the 3D graphics option enabled can have higher memory consumption than other
virtual machines. You can reduce the memory overhead by editing the configuration file (.vmx file) of your
virtual machines and disabling certain memory-related settings. Reducing the memory overhead of virtual
machines can help you increase the number of virtual machines per host.
Prerequisites
Verify that your virtual machines are using hardware version 10 or later.
Procedure
1 Shut down the virtual machine on which the 3D graphics option is enabled.
2 Disable the Accelerate 3D Graphics option.
3 Upgrade your ESXi host to use the features available in hardware version 10 or later.
4 Set the maximum size of your display to the size you need.
5 Locate the configuration file (.vmx) of your virtual machine.
6 Open the virtual machine configuration file in a text editor and add the line, svga.vgaOnly=TRUE.
This option removes all graphics and SVGA functionality from your SVGA device, but does not
remove the settings that allow BIOS to enter VGA mode.
7 Save the changes and exit the text editor.
8 Power on your virtual machine and check the display console.
9 Verify the memory reservation settings in the vmware.log file.
USB Configuration from an ESXi Host to a Virtual Machine
You can add multiple USB devices to a virtual machine when the physical devices are connected to an
ESXi host. USB passthrough technology supports adding USB devices, such as security dongles and
mass storage devices to virtual machines that reside on the host to which the devices are connected.
How USB Device Passthrough Technology Works
When you attach a USB device to a physical host, the device is available only to virtual machines that
reside on that host. The device cannot connect to virtual machines that reside on another host in the
datacenter.
A USB device is available to only one virtual machine at a time. When a device is connected to a
powered-on virtual machine, it is not available to connect to other virtual machines that run on the host.
When you remove the active connection of a USB device from a virtual machine, it becomes available to
connect to other virtual machines that run on the host.
vSphere Virtual Machine Administration
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