Steve Adams

Oracle8i Internal Services for Waits, Latches, Locks, and Memory

• Broschiertes Buch

Produktbeschreibung

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.

---

Hinweis: Dieser Artikel kann nur an eine deutsche Lieferadresse ausgeliefert werden.

Produktdetails

• Verlag: O'Reilly Media
• Seitenzahl: 132
• Erscheinungstermin: 16. November 1999
• Englisch
• Abmessung: 228mm x 154mm x 10mm
• Gewicht: 194g
• ISBN-13: 9781565925984
• ISBN-10: 156592598X
• Artikelnr.: 08438613

Autorenporträt

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 [e-mail] or via his company's web site at http: //www.ixora.com.au/.

Inhaltsangabe

Preface
Why This Book?
Warnings
Audience for This Book
About the APT Scripts
Conventions Used in This Book
Comments and Questions
Acknowledgments
Chapter 1: Introduction
1.1 The Oracle Kernel Layers
1.2 The Kernel Services
Chapter 2: Waits
2.1 Semaphores
2.2 Wait Statistics
2.3 Reference
Chapter 3: Latches
3.1 Latches and Locks
3.2 Parent and Child Latches
3.3 Latch Gets
3.4 Advanced Latching Control
3.5 Reference
Chapter 4: Locks
4.1 Lock Usage
4.2 Lock Modes
4.3 Enqueue Locks
4.4 Row Cache Enqueues
4.5 Library Cache Locks and Pins
4.6 DML Locks
4.7 Buffer Locks
4.8 Sort Locks
4.9 Reference
Chapter 5: Instance Locks
5.1 The Lock Manager
5.2 Global Locks
5.3 PCM Instance Locks
5.4 Other Instance Locks
5.5 Reference
Chapter 6: Memory
6.1 The SGA
6.2 The Shared Pool
6.3 Process Memory
6.4 Reference
Colophon