Managing virtual memory

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Specify a soft limit for the amount of physical host memory used by a virtual server.

Procedure

Specify a soft limit for physical host memory usage with the virsh memtune command: 
# virsh memtune <VS> --soft-limit <limit-in-KB>
<limit-in-KB>
Specifies the soft limit in kilobytes.
<VS>
Is the name of the virtual server as defined in the domain configuration-XML file.