Oracle 8i Internal Services: for Waits, Latches, Locks, and Memory

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9781565925984: Oracle 8i Internal Services: for Waits, Latches, Locks, and Memory

This concise book contains detailed information about Oracle internals -- information that's not readily available to Oracle customers. It lays a foundation for advanced performance tuning of the Oracle database. Based on Oracle8i release 8.1, the book describes many of the secrets of Oracle's internal services: data structures, algorithms, and undocumented Oracle system statistics. Main topics include:

  • Waits - how Oracle processes communicate via semaphores, and how to use the Oracle wait statistics to identify the source of performance problems.
  • Latches - how they keep multiple processes from inspecting protected data structures at the same time, and how to examine and control latch behavior and statistics.
  • Locks - how they work with latches to protect data structures (locks allow multiple sessions to share resources in some cases), and how locks affect performance. There is also a detailed discussion of instance locks, which are used in parallel server environments.
  • Memory - how Oracle uses memory (e.g., the various elements of the System Global Area), and how Oracle dynamically allocates and manages memory.
Oracle8i Internal Services is aimed especially at administrators and developers who need detailed internal information to do advanced performance tuning. The book will expand your repertoire of tuning solutions and troubleshooting techniques by explaining how you can use Oracle's hidden parameters and undocumented system statistics to best advantage.NOTE: The author has collected the scripts he has developed for tuning and analysis into a toolkit (known as APT, for Advanced Performance Tuning). These scripts access the Oracle X$ tables directly and provide information not otherwise available. The scripts are available to readers for free from the O'Reilly web site.

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Review:

Advanced performance tuning with Oracle involves unraveling the mysteries of the SQL database's inner workings. Oracle8i Internal Services for Waits, Latches, Locks, and Memory peels back several layers of the Oracle onion to reveal how things really work. While the author claims his quest to get to the bottom of Oracle still continues, this book is a snapshot of his current knowledge of the performance-critical internals.

The book's title tells the whole story about its content. It focuses on waits, latches, locks, and memory allocation because they have a dramatic effect on overall performance. Each of these topics is presented separately, with explanations of how each works under the hood and what can be done to optimize it. Although the title offers plenty of architectural explanation, a solid foundation into Oracle 8i release 8.1 (the version addressed by the author) is a prerequisite for understanding this text.

The presentation includes few diagrams. Instead, the author makes a special effort to list relevant Oracle parameters and their descriptions in tables, as well as examples of statistics that can be used in optimization. This is a guide for advanced administrators already on a solid footing with Oracle8i and offers plenty of insight into the crucial undocumented aspects of the relational database. --Stephen W. Plain

About the Author:

Steve Adams runs a small consulting company, Ixora, that specializes in advanced Unix and Oracle performance tuning. He is based in Sydney, Australia, but also works remotely for clients in America and Europe. Steve is a regular contributor to various Oracle discussion forums on the Internet, where he is widely regarded as the leading performance expert. His experience with Oracle dates back to version 3 (1984). However, most of his work has been in Unix performance tuning. His interest in Oracle--and Oracle internals in particular--was rekindled when working as the Unix performance expert on a benchmark of an Oracle-based application in 1995. He found the challenge of understanding Oracle performance to be extremely demanding, and yet irresistible. Steve doesn't yet claim to have mastered the topic of Oracle performance, but he does have plenty of insight to share. He can be contacted directly at steve.adams@ixora.com.au or via his company's web site at http://www.ixora.com.au/.

"Sobre este título" puede pertenecer a otra edición de este libro.

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Descripción O Reilly Media, Inc, USA, United States, 1999. Paperback. Estado de conservación: New. Subsequent. Language: English . Brand New Book. This concise book contains detailed information about Oracle internals -- information that s not readily available to Oracle customers. It lays a foundation for advanced performance tuning of the Oracle database. Based on Oracle8i release 8.1, the book describes many of the secrets of Oracle s internal services: data structures, algorithms, and undocumented Oracle system statistics. Main topics include: Waits - how Oracle processes communicate via semaphores, and how to use the Oracle wait statistics to identify the source of performance problems. Latches - how they keep multiple processes from inspecting protected data structures at the same time, and how to examine and control latch behavior and statistics. Locks - how they work with latches to protect data structures (locks allow multiple sessions to share resources in some cases), and how locks affect performance. There is also a detailed discussion of instance locks, which are used in parallel server environments. Memory - how Oracle uses memory (e.g., the various elements of the System Global Area), and how Oracle dynamically allocates and manages memory.Oracle8i Internal Services is aimed especially at administrators and developers who need detailed internal information to do advanced performance tuning. The book will expand your repertoire of tuning solutions and troubleshooting techniques by explaining how you can use Oracle s hidden parameters and undocumented system statistics to best advantage. NOTE: The author has collected the scripts he has developed for tuning and analysis into a toolkit (known as APT, for Advanced Performance Tuning). These scripts access the Oracle X$ tables directly and provide information not otherwise available. The scripts are available to readers for free from the O Reilly web site. Nº de ref. de la librería AAH9781565925984

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Descripción O Reilly Media, Inc, USA, United States, 1999. Paperback. Estado de conservación: New. Subsequent. Language: English . Brand New Book. This concise book contains detailed information about Oracle internals -- information that s not readily available to Oracle customers. It lays a foundation for advanced performance tuning of the Oracle database. Based on Oracle8i release 8.1, the book describes many of the secrets of Oracle s internal services: data structures, algorithms, and undocumented Oracle system statistics. Main topics include: Waits - how Oracle processes communicate via semaphores, and how to use the Oracle wait statistics to identify the source of performance problems. Latches - how they keep multiple processes from inspecting protected data structures at the same time, and how to examine and control latch behavior and statistics. Locks - how they work with latches to protect data structures (locks allow multiple sessions to share resources in some cases), and how locks affect performance. There is also a detailed discussion of instance locks, which are used in parallel server environments. Memory - how Oracle uses memory (e.g., the various elements of the System Global Area), and how Oracle dynamically allocates and manages memory.Oracle8i Internal Services is aimed especially at administrators and developers who need detailed internal information to do advanced performance tuning. The book will expand your repertoire of tuning solutions and troubleshooting techniques by explaining how you can use Oracle s hidden parameters and undocumented system statistics to best advantage. NOTE: The author has collected the scripts he has developed for tuning and analysis into a toolkit (known as APT, for Advanced Performance Tuning). These scripts access the Oracle X$ tables directly and provide information not otherwise available. The scripts are available to readers for free from the O Reilly web site. Nº de ref. de la librería AAH9781565925984

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