The CLOUD development integrating web applications with web databases definitely needs a fast and memory-efficient platform like Eclipse OpenJ9. The garbage collector and SHARED CLASSES between processes make possible a fast response to the web client and API requests. Eclipse OpenJ9 needs better documentation to explain to the programmers the advantages over other JAVA implementations like HotSpot.
In specific scenarios, we find that Oracle Java Cloud is suitable for agile development projects, high-concurrency applications, and deployments in multi-cloud environments. However, it may not be the best option for very specialized applications that require specific technologies not supported by the platform
IBM released the Eclipse OpenJ9 under the Eclipse Foundation and open source thinking about the need for CLOUD development efficiency. Eclipse OpenJ9 could be more suitable if want to develop an API with cloud databases like MariaDB using AWS. The memory management of Eclipse OpenJ9 makes the web performance of API faster. The capacity to run shared CLASSES in a memory partition between processes gives Eclipse OpenJ9 a design advantage over other JAVA SDK platforms.
Google App Engine is great for Java applications where you are using other Google components already, for example Google GCP, Google BigQuery, etc. Redhat, OpenShift, and Pivotal CloudFounder are great when the application is very complex and includes components that are Java and non-Java based (Python, etc). Amazon AWS is more difficult to configure than Oracle Java Cloud - Oracle Java Cloud has simpler UI.