java-in-containers.md

Java in Containers

• newer Java - better support
  • understands docker --cpu 2
• JVM ergonomics - auto-tuning based on the runtime environment (gc, heap size, compiler)
• class data sharing (CDS)
  • re-use class loading outputs - faster startups
  • enabled by default
• jlink to create a custom (minimal) JRE
  • jdeps to determine required modules
  • use multi-stage builds

Sources

• JVM in a Container (Merikan blog)
• Java 17: What’s new in OpenJDK's container awareness (RedHat)