THE MULTI-LAYER SHARED CLASS CACHE FOR DOCKER

With contributions from Hang Shao. By now you’ve no doubt heard of Eclipse OpenJ9 and its reputation for starting applications faster and using less memory. If not, you should visit the Eclipse OpenJ9 Performance page. The Shared Class Cache (SCC) capability is one of the main reasons why OpenJ9 can start faster and use less…

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…

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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…

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Comparing Jenkins startup in Docker

Containers are increasingly becoming the preferred way of deploying applications. They facilitate consistency between development and operations, allow for an easy way to build layers for reuse, and make it very easy for users to try out an application without having to deal with setting up all the prerequisites. However, just because applications have moved…

OpenJ9 shared classes with Eclipse Equinox 4.9+

The blog post Eclipse OpenJ9 performance; a bake-off on Windows mentions the Class Data Sharing (CDS) adapter required to enable OpenJ9 shared classes support for the OSGi Equinox framework. Since Eclipse Equinox 4.9 2018-09, the CDS adapter is included with Equinox builds. When running with an Eclipse OpenJ9 JVM, to enable shared classes support for the…