GSX Server allows you to set the memory size of each virtual machine and the amount of the host computer's memory that can be used for virtual machines. A third control governs the extent to which you want to allow the host operating system's memory manager to swap virtual machines out of physical RAM.

By adjusting these settings, you can affect both virtual machine and overall system performance.

The following sections describe how GSX Server uses the memory configuration parameters to manage virtual machines and system memory properly.

For information on memory use for a specific virtual machine, see Allocating Memory to a Virtual Machine.