Relationship verification… Let’s get lazy!

It’s complicated… Relationship verification is very important, but can we be a little lazy about it? Java bytecode verification entails several processes, one of which is class relationship verification. Java Virtual Machine (JVM) startup includes any JVM or application setup preceding the actual execution of the program, and one of these steps is verification. Consequently,…

Running Payara Micro on OpenJ9

In the cloud environment, you need to bring up your microservices applications quickly and frequently in respond to user demands. Therefore, having a JVM that starts up faster is important. Eclipse OpenJ9 is a JVM that has a fast start-up performance and a low memory footprint. This post outlines how to improve the start-up performance…

Categoriesvm

OpenJ9 class sharing is enabled by default

Class sharing is a feature in Eclipse OpenJ9 that improves your application’s startup performance. It also reduces the memory footprint if the same cache shared across multiple JVMs. Traditionally, this feature is turned on by explicitly specifying option -Xshareclasses in the command line. Default Class Sharing Class data sharing is enabled by default for bootstrap…

Categoriesvm

A simple JITaaS demo on Docker containers

JIT as a Service (JITaaS) is a fascinating feature that is being developed for the OpenJ9 JVM. The design separates the JIT compilation process from the JVM, enabling distributed JIT compilation, which provides many advantages. This post provides a simple method to try out JITaaS, based on docker containers. So let’s get started! You can…