Does My VM Run Balloon Driver?

The easiest way to determine whether the balloon driver for a VM is not running is through esxtop.

  • Open esxtop or resxtop for the host.
  • Switch to the Memory screen, and add the MCTL fields.
  • If the MCTL? field contains N for any VM, then the balloon driver is not running in that VM.

Note: The balloon driver is an important part of the proper operation of the ESX memory management system. The balloon driver should never be deliberately disabled in a VM. This may cause unintended performance problems (e.g. swapping), and makes tracking down memory-related problems difficult. vSphere provides other mechanisms, such as memory reservations, for controlling the amount of memory available to a VM.

Install VMware Tools and make sure the Memory Control Driver is installed.


About PiroNet

Didier Pironet is an independent blogger and freelancer with +15 years of IT industry experience. Didier is also a former VMware inc. employee where he specialised in Datacenter and Cloud Infrastructure products as well as Infrastructure, Operations and IT Business Management products. Didier is passionate about technologies and he is found to be a creative and a visionary thinker, expressing with passion and excitement, hopefully inspiring and enrolling people to innovation and change.
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