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Java Memory Management

You're reading from   Java Memory Management A comprehensive guide to garbage collection and JVM tuning

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Product type Paperback
Published in Nov 2022
Publisher Packt
ISBN-13 9781801812856
Length 146 pages
Edition 1st Edition
Languages
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Authors (2):
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Maaike van Putten Maaike van Putten
Author Profile Icon Maaike van Putten
Maaike van Putten
Dr. Seán Kennedy Dr. Seán Kennedy
Author Profile Icon Dr. Seán Kennedy
Dr. Seán Kennedy
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Toc

Table of Contents (10) Chapters Close

Preface 1. Chapter 1: Different Parts of the Java Memory 2. Chapter 2: Primitives and Objects in Java Memory FREE CHAPTER 3. Chapter 3: Zooming in on the Heap Space 4. Chapter 4: Freeing Memory with Garbage Collection 5. Chapter 5: Zooming in on the Metaspace 6. Chapter 6: Configuring and Monitoring the Memory Management of the JVM 7. Chapter 7: Avoiding Memory Leaks 8. Index 9. Other Books You May Enjoy

Obtaining relevant metrics for memory management

There are several important metrics for knowing how the memory of an application is doing. Understanding the following three important concepts that define the performance of the application is the first step here:

  • Memory that is functioning well
  • Normal latency
  • A normal level of throughput

Let’s take a look at each one of these.

Well-functioning memory

When you have experience with a specific application, you may know its stable memory-usage point. There needs to be more memory available than just the stable usage point though. Instead, a safe amount of memory needs to be available for the Java application, and this reserved memory should not be almost full. Conversely, having too much memory allocated for the Java application is also not the way to go. This is because the rest of the system will also need some memory for other processes, since the operating system is also running.

If you have an...

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