Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Java Memory Management
  • Table Of Contents Toc
  • Feedback & Rating feedback
Java Memory Management

Java Memory Management

By : Maaike van Putten, Dr. Seán Kennedy
5 (5)
close
close
Java Memory Management

Java Memory Management

5 (5)
By: Maaike van Putten, Dr. Seán Kennedy

Overview of this book

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.
Table of Contents (10 chapters)
close
close

Learning how the spaces are used

To understand how these different spaces are used, we will explain them in two different stages. Initially, we will examine how the spaces are used in the minor GC algorithm. Subsequently, with the aid of an example, we will show the algorithm in action.

Understanding the minor garbage collection algorithm

Let us start with the minor GC algorithm. Figure 3.2 is high-level pseudocode of the minor GC process:

Figure 3.2 – Pseudocode of the minor garbage collection algorithm

Figure 3.2 – Pseudocode of the minor garbage collection algorithm

Let us examine the process outlined in the preceding figure using a Given-When-Then scenario.

  • Given: S0 as the target survivor and S1 as the source survivor spaces initially.
  • When: Minor garbage collector runs. In other words, the eden space does not have enough space for an object that the JVM wishes to allocate.
  • Then:
    • All live objects from the eden space are copied to the S0 survivor space. The ages of these objects are set...
Visually different images
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Java Memory Management
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist download Download options font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon