When a virtual machine is powered on, the system creates a VMkernel swap file to serve as a backing store for the virtual machine’s RAM contents.
You can accept the default swap file location or save the file to a different location.
By default, the swap file is stored in the same location as the virtual machine’s configuration file.
Select a virtual machine.
In the VM Hardware panel, click Edit Settings.
Click VM Options.
Click the Advanced triangle to expand the advanced options.
Select an option.