Filled with careful step-by-step instructions and plenty of screenshots, this tutorial shows you JRockit and how to get the most from it. All key concepts in the JRockit JVM, such as code generation, memory management and other internals are introduced. Performance aspects of Java are discussed in detail. A complete guide to use the tools in the JRockit Mission Control suite is also included, and much more. This book is for intermediate to advanced Java Developers, who want to monitor, diagnose, profile and enhance the performance of their Java applications. It is also for people who want to understand more about the internal workings of a modern Java Virtual Machine or adaptive runtime. Parts of the book are suitable as course material for education about runtimes.
Oracle JRockit: The Definitive Guide
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Editorial Reviews
About the Author
Marcus Hirt
Marcus Hirt is one of the founders of Appeal Virtual Machines, the company that created the Java Virtual Machine JRockit. He is currently working as Team Lead, Engineering Manager and Architect for the JRockit Mission Control team. In his spare time he enjoys coding on one of his many pet projects, composing music and scuba diving. Marcus has been an appreciated speaker on Oracle Open World, eWorld, BEAWorld, EclipseCon, Nordev and Expert Zone Developer Summit, and has contributed JRockit related articles and webinars to the JRockit community. Marcus Hirt got his M.Sc. education in computer science from the Royal Institute of Technology in Stockholm.
Marcus Lagergren
Marcus Lagergren holds a M.Sc. in computer science from the Royal Institute of Technology in Stockholm, Sweden. He has a background in computer security but has worked with runtimes since 1999. Marcus Lagergren was one of the founding members of Appeal Virtual Machines, the company that developed JRockit. Marcus has been team lead and architect for the JRockit code generators and has been involved in pretty much every other aspect of the JRockit JVM internals. Since 2007 Marcus works for Oracle on fast Virtualization technology. Marcus lives in Stockholm with his wife and two daughters. He likes power tools, heavy metal and scuba diving.
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Customer Reviews
Most Helpful Customer Reviews
3 of 3 people found the following review helpful
By Noora Peura
Format:Paperback
I have been involved in developing both the JRockit JVM and JRockit Mission Control for nine years and I am thus very familiar with the subject of this book. I already knew that the authors are brilliant engineers who know what they are talking about. This book also shows that they can talk about it well. Marcus and Marcus have managed to condense years of research and development into one book and translate it to "human readable" format. This book takes you under the hood and behind the scenes of JRockit. It digs deep and goes personal, explaining not only how the JVM works but also why.
This is a book for Java developers who take their craft seriously and want to open the black box beneath them and make friends with the mystical creature that resides inside. This is a book for Java administrators who want hands-on tips on how to make their life easier and their applications run better and faster. This is a book for the computer science geek who simply needs to know how all the magic is done.
The first part of the book opens up the JVM, pulls out the parts and puts them on display. These chapters describe code generation, memory management, threads and locks, both in general and in the specific example of the JRockit JVM. This is more than a whitepaper on JRockit internals, this is a complete schoolbook in JVMs. With each chapter you also get pointers for what to do and especially what not to do in order to work with the black box rather than against it.
After a chapter on benchmarking and tuning comes the probably most comprehensive guide available to the JRockit tools - JRockit Mission Control and JRCMD. Plenty of screenshots and example outputs take you through the tools, how to use them and even how to extend them.
The last chapter introduces JRockit Virtual Edition that takes the JVM closer to the hardware by eliminating the operating system. It also takes a look at where JVM development may be heading in the future.
Personally, I especially enjoyed reading the history of the JRockit JVM, and the authors' own comments on Java and software development. These are the details that take the book beyond a technical description of JRockit and help you understand the design choices behind this complex piece of technology.
This is a book for Java developers who take their craft seriously and want to open the black box beneath them and make friends with the mystical creature that resides inside. This is a book for Java administrators who want hands-on tips on how to make their life easier and their applications run better and faster. This is a book for the computer science geek who simply needs to know how all the magic is done.
The first part of the book opens up the JVM, pulls out the parts and puts them on display. These chapters describe code generation, memory management, threads and locks, both in general and in the specific example of the JRockit JVM. This is more than a whitepaper on JRockit internals, this is a complete schoolbook in JVMs. With each chapter you also get pointers for what to do and especially what not to do in order to work with the black box rather than against it.
After a chapter on benchmarking and tuning comes the probably most comprehensive guide available to the JRockit tools - JRockit Mission Control and JRCMD. Plenty of screenshots and example outputs take you through the tools, how to use them and even how to extend them.
The last chapter introduces JRockit Virtual Edition that takes the JVM closer to the hardware by eliminating the operating system. It also takes a look at where JVM development may be heading in the future.
Personally, I especially enjoyed reading the history of the JRockit JVM, and the authors' own comments on Java and software development. These are the details that take the book beyond a technical description of JRockit and help you understand the design choices behind this complex piece of technology.
2 of 2 people found the following review helpful
By M. Eisele
Format:Paperback
This one was on my list of things to buy for quite some time. The only reason for this is simple: Oracle JRockit is one of the industry's highest performing Java Virtual Machines and I loved it's JIT everything approach since the beginning. I did not manage to do this, since it was published. But a few days ago, the digital edition arrived on my iPad and I finally found the time to read it. Sit back and relax. This is my personal view about the most stunning Java related book of 2010!
The Authors
As usual, I start with a short introduction of the authors. In this special case, I feel this is very important to understand the book. Both started out with Appeal Virtual Machines where they were founders. This was the company, which initially developed JRockit. Marcus Lagergren holds a M.Sc. in computer science from the Royal Institute of Technology in Stockholm, Sweden. He has a background in computer security but has worked with runtimes since 1999. Marcus has been team lead and architect for the JRockit code generators and has been involved in pretty much every other aspect of the JRockit JVM internals. Since 2007 Marcus works for Oracle on fast Virtualization technology.
Marcus Hirt is currently working for Oracle as Team Lead, Engineering Manager and Architect for the JRockit Mission Control team. Marcus has been an appreciated speaker on Oracle Open World, eWorld, BEAWorld, EclipseCon, Nordev and Expert Zone Developer Summit, and has contributed JRockit related articles and webinars to the JRockit community. Marcus Hirt got his M.Sc. education in computer science from the Royal Institute of Technology in Stockholm.
The Content
Java developers are always on the lookout for better ways to analyze application behavior and gain performance. As we all know, this is not as easy as it looks. If you are trying to understand more about all this you need to know far more than simple Java. The big things in terms of performance happen elsewhere: In the JVM. If you are looking for the best Server JVM out there, you'll come across JRockit. And this book is there to reveal it's secrets. This book helps you gain in-depth knowledge of Java from the JVM's point of view. It explains how to write code that works well with the JVM to gain performance and scalability.
The first chapter get's you started. You learn about the real basics. Cmd-line options and JRockit versioning. The real content starts with chapter 2. It brings you down to the inner workings of the JVM and the adaptive code generation ürinciples. If you are not used to assembly code examples, you will learn it. Examples are explained with bytecode and assemly code. If necessary instruction by instruction. Further on, code generation strategies, JIT compiling and runtime optimizations are explained as concepts with additional JRockit details. Chapter 3 takes you over to adaptive memory management. Here you will learn about the basics of heap management and garbage collection algorithms. Also scaling and performance are touched here. You get a glimpse at pitfalls and things, that will not work. Chapter 4 follows with everything about threads and synchronization and topics that are hard to debug and difficult to optimize. You get a more detailed look at special JRockit flags which help optimizing the topic. Chapter 5 gives your everything about benchmarking and tuning. You get basic hints about what to think about while creating a benchmark and about which measures to take. It also contains a brief overview about industry-standard benchmarks. After that you get to know about common bottlenecks and how to avoid them. Chapter 6 presents an overview about the JRockit Mission Control. Followed by chapter 7 which dives into the management console, touching MBeans, the runtime and further topics. The runtime analyzer is detailed in chapter 8. Learn about the recordings and how to analyze them in terms of memory, code, threads/locks and latency findings. As expected the flight recorder follows in chapter 9. Another JRockit tool, the memory leak detector is the major player in chapter 10. Chapter 11 dives into the JRCMD cmd-line utility and shows how it can be used for listing and sending diagnostic cmds to one or more locally running instance of the JVM. It's an alphabetical reference guide to the JRCMD commands. Chapter 12 contains everything you need to know about using the JRockit management APIs by showcasing examples. The last chapter 13 summarizes the basics about the JRockit Virtual Edition and gives some basics about the challenges by virtualizing Java. If needed you can dive deeper with the bibliography or even look through the glossary or index. 477 pages of content without the preface and the appendix is a big hit for your weekend. You better have some very silent times to follow this stuff!
Writing and style
As you might have guessed already: I am impressed by the book. Being used to read complex and detailed stuff which takes time, I really flew through this book. You get used to the direct and technical style very easy and it's still personal enough to be interesting so you keep on reading page after page. Even non native speakers should be able to follow, if they know the technical terms. I needed to lookup some very uncommon and hardware near things but this did not disturb the overall reading experience.
This was my fist eBook as PDF from Packt Publishing and I am not sure, if I am still willing to have the printed version, too. The many assembly and other code examples always makes you want to scroll back. If you are using a book you just need your thumb to solve this problem :) But I still like the digital reading experience in general.
My expectations
The structure is a bit different from the one I expected. The tooling around JRockit is covered a lot; something I wasn't expecting. But this is the only part, that did not fulfill my expectations. Especially because even those parts are excellent.
I expected to read some very technical content. But it was far more than that. It goes down to the metal and handles and registers and the JVM internals. If you thought, you know anything about the inner workings of a JVM ... here is what really happens. Don't ask what you can do for your JVM; ask, what your JVM can do for you :)
Conclusion and recommendation
Buy one! No .. better two! The digital edition and of course the paperback. It's worth it. If you have both, you can always carry the digital edition around and recall the basics and optimizations to yourself every time you think about writing optimized code for the JVM. Make shure, you have a silent place to read this one. And you should get a recent JRockit R28 to play around with. I wrote articles about it and I have seen it in the wild since some time. I thought I know a bit. Now, I know even more!
If you are a beginner, you probably need some more basics before reading this one.
The Authors
As usual, I start with a short introduction of the authors. In this special case, I feel this is very important to understand the book. Both started out with Appeal Virtual Machines where they were founders. This was the company, which initially developed JRockit. Marcus Lagergren holds a M.Sc. in computer science from the Royal Institute of Technology in Stockholm, Sweden. He has a background in computer security but has worked with runtimes since 1999. Marcus has been team lead and architect for the JRockit code generators and has been involved in pretty much every other aspect of the JRockit JVM internals. Since 2007 Marcus works for Oracle on fast Virtualization technology.
Marcus Hirt is currently working for Oracle as Team Lead, Engineering Manager and Architect for the JRockit Mission Control team. Marcus has been an appreciated speaker on Oracle Open World, eWorld, BEAWorld, EclipseCon, Nordev and Expert Zone Developer Summit, and has contributed JRockit related articles and webinars to the JRockit community. Marcus Hirt got his M.Sc. education in computer science from the Royal Institute of Technology in Stockholm.
The Content
Java developers are always on the lookout for better ways to analyze application behavior and gain performance. As we all know, this is not as easy as it looks. If you are trying to understand more about all this you need to know far more than simple Java. The big things in terms of performance happen elsewhere: In the JVM. If you are looking for the best Server JVM out there, you'll come across JRockit. And this book is there to reveal it's secrets. This book helps you gain in-depth knowledge of Java from the JVM's point of view. It explains how to write code that works well with the JVM to gain performance and scalability.
The first chapter get's you started. You learn about the real basics. Cmd-line options and JRockit versioning. The real content starts with chapter 2. It brings you down to the inner workings of the JVM and the adaptive code generation ürinciples. If you are not used to assembly code examples, you will learn it. Examples are explained with bytecode and assemly code. If necessary instruction by instruction. Further on, code generation strategies, JIT compiling and runtime optimizations are explained as concepts with additional JRockit details. Chapter 3 takes you over to adaptive memory management. Here you will learn about the basics of heap management and garbage collection algorithms. Also scaling and performance are touched here. You get a glimpse at pitfalls and things, that will not work. Chapter 4 follows with everything about threads and synchronization and topics that are hard to debug and difficult to optimize. You get a more detailed look at special JRockit flags which help optimizing the topic. Chapter 5 gives your everything about benchmarking and tuning. You get basic hints about what to think about while creating a benchmark and about which measures to take. It also contains a brief overview about industry-standard benchmarks. After that you get to know about common bottlenecks and how to avoid them. Chapter 6 presents an overview about the JRockit Mission Control. Followed by chapter 7 which dives into the management console, touching MBeans, the runtime and further topics. The runtime analyzer is detailed in chapter 8. Learn about the recordings and how to analyze them in terms of memory, code, threads/locks and latency findings. As expected the flight recorder follows in chapter 9. Another JRockit tool, the memory leak detector is the major player in chapter 10. Chapter 11 dives into the JRCMD cmd-line utility and shows how it can be used for listing and sending diagnostic cmds to one or more locally running instance of the JVM. It's an alphabetical reference guide to the JRCMD commands. Chapter 12 contains everything you need to know about using the JRockit management APIs by showcasing examples. The last chapter 13 summarizes the basics about the JRockit Virtual Edition and gives some basics about the challenges by virtualizing Java. If needed you can dive deeper with the bibliography or even look through the glossary or index. 477 pages of content without the preface and the appendix is a big hit for your weekend. You better have some very silent times to follow this stuff!
Writing and style
As you might have guessed already: I am impressed by the book. Being used to read complex and detailed stuff which takes time, I really flew through this book. You get used to the direct and technical style very easy and it's still personal enough to be interesting so you keep on reading page after page. Even non native speakers should be able to follow, if they know the technical terms. I needed to lookup some very uncommon and hardware near things but this did not disturb the overall reading experience.
This was my fist eBook as PDF from Packt Publishing and I am not sure, if I am still willing to have the printed version, too. The many assembly and other code examples always makes you want to scroll back. If you are using a book you just need your thumb to solve this problem :) But I still like the digital reading experience in general.
My expectations
The structure is a bit different from the one I expected. The tooling around JRockit is covered a lot; something I wasn't expecting. But this is the only part, that did not fulfill my expectations. Especially because even those parts are excellent.
I expected to read some very technical content. But it was far more than that. It goes down to the metal and handles and registers and the JVM internals. If you thought, you know anything about the inner workings of a JVM ... here is what really happens. Don't ask what you can do for your JVM; ask, what your JVM can do for you :)
Conclusion and recommendation
Buy one! No .. better two! The digital edition and of course the paperback. It's worth it. If you have both, you can always carry the digital edition around and recall the basics and optimizations to yourself every time you think about writing optimized code for the JVM. Make shure, you have a silent place to read this one. And you should get a recent JRockit R28 to play around with. I wrote articles about it and I have seen it in the wild since some time. I thought I know a bit. Now, I know even more!
If you are a beginner, you probably need some more basics before reading this one.
2 of 2 people found the following review helpful
Format:Paperback
Just like the title establish, this is the definitive guide of JRockit, including the last features of version R28.
It starts with the canonical knowledge to work and understand the JVM, showing details from the most basic until the advanced topics. Describing how and why certain features were made, how it was improved and plus several Best Practices lists to take the best of the suite of tools bundle with JRockit.
The book is wisely divided in two parts, the first is about JVM and the second part is regarding to JRockit Mission Control. Which is a powerful set to dissect JRockit Beauvoir to find out memory leaks, performance, bottlenecks, etc.
It gives an extended explanation of the parameters to take better of this tools suite with a low overhead, many of the areas referred can't be found somewhere else in such deeply detail form.
Everything in only one compendium of information done by the same creators of JRockit.
It starts with the canonical knowledge to work and understand the JVM, showing details from the most basic until the advanced topics. Describing how and why certain features were made, how it was improved and plus several Best Practices lists to take the best of the suite of tools bundle with JRockit.
The book is wisely divided in two parts, the first is about JVM and the second part is regarding to JRockit Mission Control. Which is a powerful set to dissect JRockit Beauvoir to find out memory leaks, performance, bottlenecks, etc.
It gives an extended explanation of the parameters to take better of this tools suite with a low overhead, many of the areas referred can't be found somewhere else in such deeply detail form.
Everything in only one compendium of information done by the same creators of JRockit.
Most Recent Customer Reviews
5.0 out of 5 stars
Very comprehensive, but demanding
This book has really impressed me. It goes into deep details of JVM and describes different approaches to various topics related to memory management, threads management, code... Read more
Published 6 months ago by mko
4.0 out of 5 stars
Great technical depth, of use to any advanced Java coder
This book is full of information that is useful to Java programmers. While the last half of the book is specific to JRockit, the first half is good for anyone. Read more
Published 23 months ago by Richard J. Wagner
4.0 out of 5 stars
Permanent Generation
I do manage a good deal of servers running on jRockit, and I was always wondering what jRockit does for the Permanent Generation..? Read more
Published on July 30, 2010 by Ajeet K. Sahu
5.0 out of 5 stars
Comprehensive and In-Depth
The target audience for Oracle JRockit: The Definitive Guide is developers and administrators with a few years of experience working with Java installations. Read more
Published on July 21, 2010 by G. Lohr
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