java 21

The Ultimate 10 Years Java Garbage Collection Guide (2016–2026) – Choosing the Right GC for Every Workload

Posted by Alexius Dionysius Diakogiannis on in Core Java 0 Comment

First published on foojay.io

Memory management remains the primary factor for application performance in enterprise Java environments. Between 2017 and 2025, the ecosystem shifted from manual tuning to architectural selection. Industry data suggests that 60 percent of Java performance issues and 45 percent of production incidents in distributed systems stem from suboptimal Garbage Collection (GC) behavior. This guide provides a strategic framework for selecting collectors based on workload characteristics. It covers the transition from legacy collectors to Generational ZGC, analyzing trade-offs regarding throughput, latency, and hardware constraints with mathematical precision. Continue reading “The Ultimate 10 Years Java Garbage Collection Guide (2016–2026) – Choosing the Right GC for Every Workload” →

Virtual Threads (Project Loom) – Revolutionizing Concurrency in Java

Posted by Alexius Dionysius Diakogiannis on in Core Java
Project Loom Virtual Threads in Java

Introduction

Concurrency has always been a cornerstone of Java, but as applications scale and demands for high throughput and low latency increase, traditional threading models show their limitations. Project Loom and its groundbreaking introduction of virtual threads redefines how we approach concurrency in Java, making applications more scalable and development more straightforward.

In this post, we’ll go deep into virtual threads, exploring how they work, their impact on scalability, and how they simplify backend development. We’ll provide both simple and complex code examples to illustrate these concepts in practice.

Continue reading “Virtual Threads (Project Loom) – Revolutionizing Concurrency in Java” →

The Generational Z Garbage Collector (ZGC)

Posted by Alexius Dionysius Diakogiannis on in Core Java 2 Comments
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The Generational Z Garbage Collector (ZGC)

The Generational Z Garbage Collector (GenZGC) in JDK 21 represents a significant evolution in Java’s approach to garbage collection, aiming to enhance application performance through more efficient memory management. This advancement builds upon the strengths of the Z Garbage Collector (ZGC) by introducing a generational approach to garbage collection within the JVM. Continue reading “The Generational Z Garbage Collector (ZGC)” →