Java 1.8 Migration - Performance and Garbage Collection
Java 7 to Java 8 - that is easy! I have been working on migrating our web application from Java 1.7 to Java 1.8. Migrating our web app is a lot of challenge. What makes it more challenging is that our web application has a really unique process footprint (well that can be said for all web application). You have to know your application like the back of your hand especially if you want to tune garbage collection for it. When I accepted the challenge of changing our web application from Java 1.7 to Java 1.8. I thought that it was going to just a breeze considering that from 1.7 to 1.8 was not that far of a version. It turned out that I was totally wrong. Here are some of the major challenges that I encountered: 1. Permanent Generation turned into MetaSpace Before Java, 1.8 class metadata is located in the permanent generation of the java heap. This can be set using the -XX:PermSize option. This was removed in Java 1.8 ( Remove Permanent Generation ). The reason why it was remo