Java Memory Management

Improve application performance by tuning, monitoring and profiling both the garbage collector and JVM Key FeaturesUnderstand the different parts of Java memory and the various garbage collectors so you can select your preferred oneExplore how memory management can help to effectively improve performanceLearn how to spot and avoid memory leaks to enhance application performanceBook Description Understanding how Java organizes memory is important for every Java professional, but this particular topic is a common knowledge gap for many software professionals. Having in-depth knowledge of memory functioning and management is incredibly useful in writing and analyzing code, as well as debugging memory problems. In fact, it can be just the knowledge you need to level up your skills and career. In this book, you'll start by working through the basics of Java memory. After that, you'll dive into the different segments individually. You'll explore the stack, the heap, and the Metaspace. Next, you'll be ready to delve into JVM standard garbage collectors. The book will also show you how to tune, monitor and profile JVM memory management. Later chapters will guide you on how to avoid and spot memory leaks. By the end of this book, you'll have understood how Java manages memory and how to customize it for the benefit of your applications. What you will learnUnderstand the schematics of debugging and how to design the application to perform wellDiscover how garbage collectors workDistinguish between various garbage collector implementationsIdentify the metrics required for analyzing application performanceConfigure and monitor JVM memory managementIdentify and solve memory leaksWho this book is for This book is for all levels of Java professionals, regardless of whether you're a junior or senior developer, a DevOps engineer, a tester, or the system admin of a Java application. If you currently don't have in-depth knowledge of Java memory, garbage collection, and/or JVM tuning, then this book will help you to take your Java skills to the next level.

Published in 1996, Richard Jones’s Garbage Collection was a milestone in the area of automatic memory management. The field has grown considerably since then, sparking a need for an updated look at the latest state-of-the-art developments. The Garbage Collection Handbook: The Art of Automatic Memory Management brings together a wealth of knowledge gathered by automatic memory management researchers and developers over the past fifty years. The authors compare the most important approaches and state-of-the-art techniques in a single, accessible framework. The book addresses new challenges to garbage collection made by recent advances in hardware and software. It explores the consequences of these changes for designers and implementers of high performance garbage collectors. Along with simple and traditional algorithms, the book covers parallel, incremental, concurrent, and real-time garbage collection. Algorithms and concepts are often described with pseudocode and illustrations. The nearly universal adoption of garbage collection by modern programming languages makes a thorough understanding of this topic essential for any programmer. This authoritative handbook gives expert insight on how different collectors work as well as the various issues currently facing garbage collectors. Armed with this knowledge, programmers can confidently select and configure the many choices of garbage collectors. Web Resource The book’s online bibliographic database at www.gchandbook.org includes over 2,500 garbage collection-related publications. Continually updated, it contains abstracts for some entries and URLs or DOIs for most of the electronically available ones. The database can be searched online or downloaded as BibTeX, PostScript, or PDF. E-book This edition enhances the print version with copious clickable links to algorithms, figures, original papers and definitions of technical terms. In addition, each index entry links back to where it was mentioned in the text, and each entry in the bibliography includes links back to where it was cited.

The process to transition from being a new Java developer to a confident and competent coder is a difficult one. In this book, author and long-time Java trainer Matt Greencroft guides you through some of the topics that will help you make significant steps along this journey. It is packed with important topics that experienced programmers should know and understand, together with practical advice on how to tune your applications and the JVM to get the best possible performance. Rather than containing a theoretical, highly detailed understanding of the internals of the Java Virtual Machine, this book takes a practical approach. You’ll learn enough to get a good understanding of how the JVM works and how memory is managed in Java, how to make great coding choices, how to configure the JVM, and how to evaluate and benchmark different options to assess their performance metrics in a robust and manageable way. Whether you have an existing application with performance issues to address, have taken one of Matt’s courses and are selecting this book as supporting material, or are simply wanting to advance your career by becoming a better programmer, this book will give you lots of stills and practical experience.

Written by the inventors of the technology, The Java® Virtual Machine Specification, Java SE 7 Edition, is the definitive technical reference for the Java Virtual Machine. The book provides complete, accurate, and detailed coverage of the Java Virtual Machine. It fully describes the invokedynamic instruction and method handle mechanism added in Java SE 7, and gives the formal Prolog specification of the type-checking verifier introduced in Java SE 6. The book also includes the class file extensions for generics and annotations defined in Java SE 5.0, and aligns the instruction set and initialization rules with the Java Memory Model.

Eliminating unwanted or invalid information from a computer's memory can dramatically improve the speed and officiency of the program. this reference presents full descriptions of the most important algorithms used for this eliminatino, called garbage collection. Each algorith is explained in detail with examples illustrating different results.

Targeting the critical issue of performance, this guide shows how to resolve bottlenecks, increase speed, and get better overall performance for Java Websites. The author team is a group of seasoned performance experts who have helped hundreds of customers resolve enterprise Website performance issues.

Delve into JVM inner workings and explore internals, memory management, and performance optimization Key Features Uncover the intricacies of JVM, from class loading to garbage collection, and more Master JVM memory management for efficient resource use and reduced overhead Apply JVM knowledge through case studies, reinforcing your understanding of internals Purchase of the print or Kindle book includes a free PDF eBook Book DescriptionMastering the Java Virtual Machine is a comprehensive guide that will take you into the heart of Java programming, guiding you through the intricate workings of the Java Virtual Machine (JVM) and equipping you with essential skills to become a proficient Java developer. You’ll start by understanding the JVM, exploring its architecture and how it executes Java code. Through detailed explanations and real-world examples, you’ll gain a deep understanding of JVM internals, enabling you to write efficient and optimized Java applications. As you progress, you’ll delve into memory management and execution, unraveling the complexities of heap and stack management, garbage collection, and memory profiling. You'll learn how memory is allocated and reclaimed in the JVM, as well as how to optimize memory usage and identify performance bottlenecks in your applications. With this knowledge, you’ll be able to create Java programs that are not only robust but also highly performant. By the end of this book, you’ll have the skills needed to excel in Java programming, writing efficient, maintainable code.What you will learn Understand JVM architecture and bytecode execution Explore memory management and optimize memory usage Compare and evaluate alternative JVMs like GraalVM Master reflection for dynamic behavior in Java applications Utilize Java annotation processors for code generation Get to grips with reactive programming principles for scalable applications Who this book is for This book is for Java developers seeking to deepen their expertise in the Java Virtual Machine (JVM) and optimize Java applications for peak performance. It caters to both intermediate and seasoned professionals who want to explore specific aspects such as JVM internals, memory management, threading, security, and performance tuning.