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Hello,

Check out the nova.conf config file reference:

http://docs.openstack.org/havana/config-reference/content/list-of-compute-config-options.html

Search for cpu_allocation_ratio and you'll see a table that lists a few options for overcommitting such as:

  • cpu_allocation_ratio
  • disk_allocation_ratio
  • ram_allocation_ratio

Hope that helps,

Joe