Getting started with OpenJ9 CRIU Support

Overview In this blog you will learn how you can use our setup containerfiles as a convenience to create an environment for experimentation with Eclipse OpenJ9 CRIU Support. Get the containerfile The following section uses a Ubuntu 20.04 containerfile. Click here to jump to using a UBI8 containerfile. Ubuntu 20.04 To get started clone the…

Fast JVM startup with OpenJ9 CRIU Support

In recent times, businesses have placed an emphasis on modernizing their software stack into cloud-based services. This transformation has generally meant breaking up big complex long running modules into much smaller short-lived units. These units are often packaged as containers and can be individually provisioned in worker nodes and scaled to meet demands. The days…

Exploring JITServer on the new Linux on IBM z16 Platform

With the recent 0.32 release of Eclipse OpenJ9, the JITServer technology was officially released and made available for the Linux on IBM z System/LinuxONE platforms. This release also coincides with the recently launched IBM z16 technology. This blog will provide an overview of the JITServer technology and demonstrate some of its key benefits using the…

Copyforward&Mark Hybrid Collector

Background Xgcpolicy:balanced Open J9’s Balanced GC policy is a region based, incremental generational collector, unlike the default generational concurrent policy (gencon), which is probably best suited for the most traditional java application, Balanced GC is designed to be used on large heap to reduce maximum pause times. In Balanced GC The Java heap is divided…

Balanced GC performance improvements: Eden + heap sizing improvements

Open J9’s Balanced GC policy is a region based, generational collector, which aims to provide a bound on worst case pause times, by eliminating the need for frequent global garbage collections. A more detailed description of how Balanced GC policy works, along with some of its advantages over the Gencon GC policy, can be found…