Resource selection for hosted game sessions

Resources for hosting game sessions can be dynamically selected based upon factors in addition to availability and capacity. A requested session may have various criteria enabling it to be hosted on different types of resources, such as different types of resource instances operating on physical servers. While a fixed amount of capacity can be purchased over an extended period of time, options can also exist that enable purchasing resource capacity for a limited period of time, or purchasing excess capacity without a fixed time limit but that is subject to potential interruption. Benefits relating to cost and performance may offset these potential limitations, and the selection of a type of resource to host a game can be based upon an analysis of these factors. If a game session is to be interrupted or will time out, advance notice can be provided such that the game can take a corresponding action.