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

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abh1sar merged 2 commits into from
Apr 15, 2026
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kvm,compute-offering: prevent CPU limiting completely #636

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kvm,compute-offering: prevent CPU limiting completely
shwstppr Mar 27, 2026
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Apply suggestion from @DaanHoogland
abh1sar Apr 15, 2026
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8 changes: 8 additions & 0 deletions source/adminguide/service_offerings.rst
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Expand Up @@ -249,6 +249,14 @@ 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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