Metadata manager for database query optimizer

Details Metadata manager for database query optimizer Metadata manager for database query optimizer

2006-02-07

2006-02-07

Mizrahi, Diane (Department: 2165)

Data processing: database and file management or data structures

Database design

Data structure types

Reexamination Certificate

active

06996556

ABSTRACT:
A metadata manager is used in a database management system to collect and maintain metadata associated with a database. Multiple optimizer instances are permitted to access the metadata maintained by the metadata manager, often eliminating the need for individual optimizer instances to retrieve and process metadata directly from the database. As such, the overhead associated with operations such as collecting, refining, retrieving and/or maintaining of metadata can be off-loaded from the optimizer instances, often accelerating individual cost estimation calculations by optimizer instances, facilitating reuse of metadata calculations and refinements, and improving metadata consistency between multiple related cost estimates.

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Herve Lejeune, Scalability and Performance Oracle 9i Databases, Mar. 2002, Oracle White Paper, pp. 1-24.

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