Starting today, Amazon EC2 High Memory instances with 24TiB of memory (u-24tb1.112xlarge) are now available in US West (Oregon) Region and instances with 9TiB of memory (u-9tb1.112xlarge) are now available in Asia Pacific (Hyderabad) Region. Customers can start using these new High Memory instances with On Demand and Savings Plan purchase options.
Source:: Amazon AWS