US Patent 9448824 Capacity availability aware auto scaling

Technologies are described herein for capacity availability aware auto scaling. Capacity event auto scaling rules can be defined that specify how computing resources are to be scaled during a capacity event. The capacity event auto scaling rules can be defined to allow utilization of the computing resources to increase during a capacity event. A probability that capacity will be available for providing computing resources during a capacity event can also be computed. Standard auto scaling rules utilized by an auto scaling component can then be modified based upon the computed probability. Other types of actions might also be taken based upon the computed probability, such as reserving instances of computing resources.