1. A method for optimizing cloud resources in utilizing a pool of virtual machines to service user workloads, the method comprising: receiving a request from a user's workload for an instance of a virtual machine; obtaining said instance of said virtual machine from a pool of virtual machines; creating, by a processor, a writeable partition to store middleware and user activity to be associated with said obtained instance of said virtual machine; mounting said created writable partition in a storage unit; unmounting said created writable partition from said storage unit in response to said instance of said virtual machine being terminated; erasing contents of said created writable partition in response to said instance of said virtual machine being terminated; and returning said instance of said virtual machine to said pool of virtual machines in response to said instance of said virtual machine being terminated.