Virtualization Essentials

Configuring VM Memory Options

For such an important part of the virtual machine, it is a bit ironic that there is only one adjustment that can be made to a virtual machine’s memory and that is to either increase or decrease the size. Additional elements are built into the hypervisor that can be adjusted on a macro level to adjust memory usage throughout the host, but we’ll cover them in the next section. Just as with a physical server, a virtual server must be configured with enough resources to do the job it has been assigned. If too much memory is assigned, then memory could be wasted, not being available to other virtual machines. If too little memory has been configured, then memory will constantly be paging to the physical disk and affect ...