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You're reading from  Advanced Oracle PL/SQL Developer's Guide (Second Edition) - Second Edition

Product typeBook
Published inFeb 2016
Reading LevelIntermediate
Publisher
ISBN-139781785284809
Edition2nd Edition
Languages
SQL
Tools
Oracle Database
Concepts
Database Administration
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Author (1)
Saurabh K. Gupta
Saurabh K. Gupta
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Saurabh K. Gupta

Saurabh K. Gupta is a seasoned database technologist with extensive experience in designing high performance and highly available database applications. His technology focus has been centered around Oracle Database architecture, Oracle Cloud platform, Database In-Memory, Database Consolidation, Multitenant, Exadata, Big Data, and Hadoop. He has authored the first edition of this book. He is an active speaker at technical conferences from Oracle Technology Network, IOUG Collaborate'15, AIOUG Sangam, and Tech Days. Connect with him on his twitter handle (or SAURABHKG) or through his technical blog www.sbhoracle. wordpress.com, with comments, suggestions, and feedback regarding this book.
Read more about Saurabh K. Gupta

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Result cache in Real Application Clusters

The Oracle Database Real Application Cluster (RAC) option allows the sharing of a cluster database across multiple database instances. It enhances the scalability and availability of database applications.

The Result cache, being the native component of database instance memory, is supported on RAC environments. The behavior and handling of result caching on RAC is the same as that of a single instance database. Here are the salient features of result caching in RAC:

  • Each RAC instance maintains a local version of the Server Result Cache in the shared pool of the SGA

  • A result is added to the instance result cache when a user executes a SQL query or a PL/SQL function on a database instance

  • If the same user executes the same query from another instance, the cached result is copied to that instance's result cache over RAC interconnect

  • The dynamic view GV$RESULT_CACHE_OBJECTS will show duplicate entries with the same cache ID, but for different instances ...

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Advanced Oracle PL/SQL Developer's Guide (Second Edition) - Second Edition
Published in: Feb 2016Publisher: ISBN-13: 9781785284809
© 2016 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Saurabh K. Gupta

Saurabh K. Gupta is a seasoned database technologist with extensive experience in designing high performance and highly available database applications. His technology focus has been centered around Oracle Database architecture, Oracle Cloud platform, Database In-Memory, Database Consolidation, Multitenant, Exadata, Big Data, and Hadoop. He has authored the first edition of this book. He is an active speaker at technical conferences from Oracle Technology Network, IOUG Collaborate'15, AIOUG Sangam, and Tech Days. Connect with him on his twitter handle (or SAURABHKG) or through his technical blog www.sbhoracle. wordpress.com, with comments, suggestions, and feedback regarding this book.
Read more about Saurabh K. Gupta

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