Eclipse OpenJ9

A high-performance, scalable, Java virtual machine implementation

Run Java apps in the cloud a fast and efficient JVM.

27 December 2025

Article

Eclipse OpenJ9 garbage collection policies and heap tuning for high-performance Java applications

Discover how to optimize Eclipse OpenJ9 garbage collection policies, tune Java heap configurations, reduce pause times, and improve JVM performance for large-scale applications.

19 December 2025

Tutorial

Boost Java performance with OpenJ9 JITServer in Kubernetes

Explore how to use OpenJ9 JITServer in Kubernetes to optimize Java performance, improve startup time, reduce container memory usage, and scale cloud-native Java applications on IBM Cloud, OpenShift, and Kubernetes clusters for enterprise workloads.

16 December 2025

Article

Optimize your Java cloud-native applications with OpenJ9 JITServer

In this practical guide and demo, discover how Eclipse OpenJ9 JITServer cuts memory use and cloud costs while keeping Java micro‑container performance high.

15 December 2025

Article

Optimize Spring Boot applications using minified JREs and Open Liberty

Transform traditional Spring Boot applications into cloud‑ready containers with Open Liberty and OpenJ9. Smaller images, faster start‑up, and superior performance.

19 June 2024

Article

Explore options for downloading IBM Semeru Runtimes

Learn about IBM Semeru Runtimes, editions available, and where to download.

22 September 2021

Blog post

No-cost IBM Semeru Runtime Certified Edition 11 now available for all Java developers and deployments

This edition includes the same OpenJDK class libraries and Eclipse OpenJ9 JVM as the Open Edition

08 May 2020

Blog post

IBM and Java: 8, 11, and beyond

Supporting an open, performant, and cloud-optimized Java runtime for the future

11 January 2019

Blog post

OpenJDK with Eclipse OpenJ9: No worries, just improvements

The right JDK for your business

30 November 2018

Article

Optimize JVM start-up with Eclipse OpenJ9

Optimize JVM start-up with Eclipse OpenJ9. SharedClasses caching, dynamic AOT, and more.

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Eclipse OpenJ9

A high-performance, scalable, Java virtual machine implementation

Eclipse OpenJ9 garbage collection policies and heap tuning for high-performance Java applications

Boost Java performance with OpenJ9 JITServer in Kubernetes

Optimize your Java cloud-native applications with OpenJ9 JITServer

Optimize Spring Boot applications using minified JREs and Open Liberty

Explore options for downloading IBM Semeru Runtimes

No-cost IBM Semeru Runtime Certified Edition 11 now available for all Java developers and deployments

IBM and Java: 8, 11, and beyond

OpenJDK with Eclipse OpenJ9: No worries, just improvements

Optimize JVM start-up with Eclipse OpenJ9