memtune

Specifies a soft limit for the physical host memory requirements of the virtual server memory.

Syntax

Where:

<limit-in-KB>: Is the minimum physical host memory in kilobytes remaining available for the virtual server memory in case the physical host memory resources are reduced.
<VS>: Is the name, ID, or UUID of the virtual server.

--soft-limit: Specifies the minimum physical host memory remaining available for the virtual server in case the memory resources are reduced.

Warning: Do not use the options --hard-limit and --swap_hard_limit. Their use might lead to a virtual server crash.

This example allows the host to limit the physical host memory usage of vserv1 memory to 256 MB in case the host is under memory pressure:

# virsh memtune vserv1 --soft-limit 256000

This example displays the memory tuning parameters of vserv1. Be sure not to modify the hard_limit and swap_hard_limit parameters.

# virsh memtune vserv1
hard_limit     : unlimited
soft_limit     : 256000
swap_hard_limit: unlimited