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Oracle RAC Performance Tuning (Oracle In-Focus) (Volume 50), by Brian Peasland
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This book is the first of its kind, a book dedicated to tuning the Oracle high availability RAC architecture. Oracle RAC databases are flexible and robust, and along with this flexibility comes complexity, making RAC tuning one of the most challenging areas of Oracle tuning. Packed with incisive insights and examples from one of America's leading RAC experts, guru Brian Peasland delivers an indispensible book for all RAC administrators who need to guarantee that their RAC systems run at optimal performance. It's not enough for the DBA to maintain and control RAC database, the RAC DBA must also have an arsenal of tools and scripts that will help them ensure that their RAC database run at optimal levels. This book will be valuable to all Oracle professionals who must tune their Oracle RAC systems for peak performance. Similar to tuning Oracle database systems in general, Oracle RAC performance tuning covers a wide variety of focus areas. Topics will include Oracle wait events specific to RAC deployments, using Oracle Enterprise Manager Grid Control and AWR in diagnosing RAC problems, and RAC utilities such as OS Watcher and ORAchk (formerly RACcheck). This book will also discuss architecture issues related RAC performance, delving into the cluster interconnect, physical disk layout and Oracle 12c new Flex Clusters. Oracle RAC also allows the workload the spread among several low cost servers (scale-out) rather than a large single server (scale-up), and this book examines these approaches from a tuning perspective. Many companies are working towards private cloud implementations using RAC, and this book is perfect for the DBA's charged with . Oracle 12c RAC raises the bar with its new multi-tenant database implementation. Think of multi-tenant as virtualization at the database level. As more companies start leveraging Oracle 12c RAC for their enterprise database architecture, it is important that the system be designed and tuned properly to ensure the application has a well-performing user experience. This unique book provides a one-stop location for any RAC DBA who must become a RAC performance tuning specialist. Most Oracle RAC books on the market devote only one chapter to performance tuning. The information in this book provides a solid foundation for one’s first RAC deployment, and provide you with the tools and methods needed to keep your complex RAC systems running optimally. While this book is not for beginners, the reader is given sufficient background throughout the chapters so that most Oracle DBAs, even those will little Oracle RAC experience, will be able to understand its contents. Oracle RAC is inherently complex. This explains the concepts before delving into highly technical areas. Many in-depth areas of RAC tuning are explored that help the DBA reveal hidden performance trends within even the most complex RAC database.
- Sales Rank: #1568787 in Books
- Published on: 2015-01-25
- Original language: English
- Number of items: 1
- Dimensions: 9.25" h x 1.01" w x 7.50" l, 1.68 pounds
- Binding: Paperback
- 446 pages
Most helpful customer reviews
3 of 3 people found the following review helpful.
√ Well-Written & Great Selection of Ideas for Tuning
By Bassocantor
When reading ORACLE RAC PERFORMANCE TUNING, don't be too quick to quibble because the author is suggesting a method that you don't use. Try to be open to other ideas. Here's what I mean: DBAs are a smart, but tough lot of characters. If you get 10 DBAs reading a book on performance tuning, each of the 10 will be jumping up and down shouting, "That's not how I would do it," or "That's not what Tom Kyte says," etc. Instead, look for ideas that are something new--some new technique that you haven't seen before. By having this attitude, I was able to glean some really great ideas--things that honestly I had not thought of. For example, page 93 has a script to find what object is being sent back and forth the most between nodes. Honestly, I never thought of looking at the object names. That's just one example. The chapters on benchmarking tools is pretty much new territory for me.
♦ There is a really great thing in this book, that I haven't seen in other technical books. Chapter 14 is entitled, "Book Summary," where Brian gives the essential points in the book. This is a GREAT idea. In fact, I think readers should actually read this part first. I bet the author used Chapter 14 as the outline for writing the book. (Am I right, Brian?) The only nit I have here, is that I wish the author would have included the chapter reference for each major point.
♦ The author, Brian Peasland, makes an excellent point in the "Book Summary" section: "Tune the system as if it were a single-instance database. All of the single-instance tuning techniques still apply to Oracle RAC. An application that will not scale with a single-instance Oracle database will not scale with Oracle RAC." (I would add that if it doesn't scale on a single instance, it will likely be much worse with RAC.) This is a great insight--I came to the same conclusion as Brian. Of course, our scripts will be a little different, but the tuning concepts are the same.
♦ On the overall quality of the book: To design and produce a quality book on an extensive topic is not a simple task--especially a book of this magnitude. Let's face it, most techies are TERRIBLE at writing and presenting. It's such a pleasure to read a book that is clearly written and thoughtful. The author has clearly spent an ENORMOUS amount of time researching scripts, wait events, concepts, etc. I was very impressed with the quality of the work. Scripts nicely formatted, concepts clearly explained, etc. Again, a really nice job for both writer and editor.
♦ In addition, someone (the editor, Don Burleson, I think) has spent a lot of time getting the design of this book right. The physical formatting of the book is excellent--good font size, good margins, clear and easy to read. If you remember some of the very early Rampant Press books, you are in for a pleasant surprise. As another example of the quality of this book, I note the cover design. Again, someone (Janet Burleson, cover designer) has spent a TON of time producing a quality book. The end product clearly reflects a lot of hard work--books like this do not just happen by accident.
♦ There are a huge number of technical ideas--I recommend skipping around to the topics that interest you. I liked especially the chapters talking about the interconnect, and various scripts to spot interconnect problems. In addition, I quickly found one topic that really startled me, because I haven't seen it documented this thoroughly before. I mean, "Bloom Filters" on page 202. Brian illustrates this concept nicely. This is important to me because we had encountered bugs related to this feature, but none of us DBAs knew what in the world the "Bloom Filter" meant.
√ All in all, ORACLE RAC PERFORMANCE TUNING is an outstanding accomplishment. Tons of great ideas in every chapter, clearly explained, with lots of nice charts and diagrams. I am sure I will be using this book as a reference for a long time. I am recommending to my boss that she get copies for our group. Highly Recommend!
Review copy courtesy of Rampant Press in exchange for impartial review
2 of 2 people found the following review helpful.
I wish he had written this ten years ago
By John Watson
This book gives you what it says on the cover: Oracle RAC Performance Tuning. You will not, for example, find much detail of using Flex Clusters (though he does de-bunk one of the common myths) nor any real mention of policy management, ACFS, or QoS. Perhaps Brian will cover them in his next book. No problem - what you will find is four hundred pages about performance tuning, and they are all worth reading. The author follows similar techniques to those I use, and formalizes them wonderfully. The general methodology is that you cannot tune anything unless you understand it. So most of the book is about how to work out what the hardware, the operating system, and Oracle, are doing; how they are doing it; and why. Understand all that, and the tuning is obvious.
The content will be useful for all DBAs, though the level of assumed knowledge is such that this is not for absolute beginners. You do need to be familiar with SQL, PL/SQL, and DB admin; you need to know how to read an execution plan. To put it in Oracle Uni terms, ideally you need to be at OCP level and studying for the OCM and the RAC Specialization. The material goes far beyond what Oracle Uni teaches for those qualifications. Those not yet so familiar with RAC will appreciate the way in which each chapter begins with an exposition of the architectural concept, and those of us who think we know it all will learn from the detail. For example, chapter two starts with a nice description of how the global cache service and global enqueue service work, and then WHAM! A bunch of scripts that show how to track exactly which blocks are being transferred across the interconnect when you select a particular row. The result is a nice combination of architectural detail with plenty of what one might call "tips and tricks". There are chapters on tuning specific elements of a GI environment that are very practical: the interconnect; storage; memory; parallel processing. The chapter "RAC Support Tools" is, for me, the highlight in this category. Other chapters are more theoretical: cache fusion; wait events; AWR, ADDM, ASH.
I wish he had written this ten years ago, it would have saved me (and my clients) incalculable hours. I don't agree with everything he says - but that doesn't mean that he is wrong, it just means that I have to do some more research. Whatever your skill level, you will learn from this book. I've seen RAC since release 9.x, and parallel server before that. Even so, Brian has taught me a lot.
--
John Watson
Oracle Certified Master DBA
http://skillbuilders.com
1 of 1 people found the following review helpful.
Tuning RAC is like tuning regular Oracle (with just a few extra considerations)
By Mark Powell
Disclaimer: I was a bit surprised when the author whom I have encountered on the Oracle support and OTN forums asked me to review his book since we have never meet in person and have not always agree in our postings. Nevertheless, I am very glad I said yes because this is a good book. I say this based on my experience having worked with every major release of Oracle since version 6 up to 11.2. This is a good book because I believe the reader will find this book useful. Brian does not waste time covering how to install and create RAC databases, but instead sticks to the intent of the title: tuning. From his early statement that for the most part tuning RAC is the same as tuning non-RAC he covers the range of tuning topics with emphasis on how the feature is affected by or works when RAC is in use. For example he demonstrates why nocache sequences are not a good idea in normal Oracle and why this option can be a disaster when used with RAC. Naturally he covers all the RAC specific topics like the GRD, GCS, and the interconnect. Brian also includes coverage with examples of the output from a slew of free optional Oracle provided tools that can monitor the OS and pull statistics out of Oracle such as oswatcher, oratop, and RAC Diag. He includes references to the Oracle support notes on each tool which in turn provide the download url’s. The book has numerous useful scripts for looking at RAC related activity. I believe this book is worth consideration.
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