The EC2 Hibernation feature is now available in the Asia Pacific (Jakarta) and (Osaka) AWS Regions. Hibernation gives you the ability to launch EC2 instances, set them up as desired, and then pause and resume them again whenever you need to. Your instances and applications will pick up right where they left off instead of rebuilding their memory footprint from a cold boot. Hibernation enables you to maintain a fleet of pre-warmed instances, getting you to a productive state in less time and without modifying your existing applications. Hibernation is available for instances running Linux and Windows OSes.
Source:: Amazon AWS