Eclipse OpenJ9: Java for Cloud applications
October 12, 2022

Eclipse OpenJ9: Java for Cloud applications

Fernando Roque | TrustRadius Reviewer
Score 10 out of 10
Vetted Review
Verified User

Overall Satisfaction with Eclipse OpenJ9

Eclipse OpenJ9 is supported by IBM. It has excellent memory performance and faster startup compared with Java HotSpot(supported by Oracle). Eclipse OpenJ9 design is optimized to comply with the memory use of the Cloud. The best feature of Eclipse OpenJ9 is CLASS SHARING. It creates a shared memory for the classes for use between processes.


  • Faster startup
  • Memory administration
  • Shared CLASSES between processes


  • Marketing to promote the advantages it provides for the CLOUD.
  • Documentation to used its garbage collector effectively.
  • Documentation to implement the SHARED CLASESS between processes and understand the advantages.
  • Open Source Alternative to Oracle JDK supported by IBM.
  • Excellent performance for CLOUD development for APIs.
  • Multiplatform (LInux, Windows) Java SDK that runs in a container like Docker.
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.

Do you think Eclipse OpenJ9 delivers good value for the price?


Are you happy with Eclipse OpenJ9's feature set?


Did Eclipse OpenJ9 live up to sales and marketing promises?


Did implementation of Eclipse OpenJ9 go as expected?


Would you buy Eclipse OpenJ9 again?


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.


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