virsh numatune can either set or retrieve the NUMA parameters for a specified domain. Within the Domain XML file these parameters are nested within the
<numatune> element. Without using options, only the current settings are displayed. The
numatune domain command requires a specified domain and can take the following options:
--mode - The mode can be set to either
preferred. Running domains cannot have their mode changed while live unless the domain was started within
--nodeset contains a list of NUMA nodes that are used by the host physical machine for running the domain. The list contains nodes, each separated by a comma, with a dash
- used for node ranges and a caret
^ used for excluding a node.
Only one of the following three options can be used per instance:
--config will take effect on the next boot of a persistent guest virtual machine.
--live will set the scheduler information of a running guest virtual machine.
--current will affect the current state of the guest virtual machine.