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kvm,compute-offering: prevent CPU limiting completely #636

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kvm,compute-offering: prevent CPU limiting completely #636

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3 changes: 3 additions & 0 deletions source/adminguide/service_offerings.rst
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Expand Up @@ -249,6 +249,9 @@ To create a new compute offering:
- **CPU cap**: Whether to limit the level of CPU usage even if spare
capacity is available.

.. note::
On KVM hypervisor, to allow CloudStack to relinquish CPU usage control entirely, set this option to false and set CPU speed to zero. Note that Instances with zero CPU speed offerings should not be co-hosted with Instances using non-zero CPU speed offerings, as the CPU speed value is used as a relative weight (share) in the ``cputune`` section of the domain XML, and mixing zero and non-zero values would skew the weighting.

- **Volatile**: If checked, Instances created from this service offering
will have their root disks reset upon reboot. This is useful for
secure environments that need a fresh start on every boot and for
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