My Oracle Support Banner

Master Note: Overview of Oracle Segment Storage (Doc ID 1491960.1)

Last updated on AUGUST 06, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 8.1.7.0 and later
Information in this document applies to any platform.

Purpose

Oracle Segment Storage lets you specify how Oracle Database should store a database object. Storage parameters affect both how long it takes to access data stored in the database and how efficiently space in the database is used.
Database space management has always been an important part of any database administrator's job. Administrators spend a significant amount of their time planning and monitoring the space utilization in order to ensure uninterrupted database operations. In this note we are covering the segment storage parameters.

Details

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Purpose
Details
 Oracle Segment Concept
 Introduction to Logical Storage Structures
 Storage - Blocks, Extents, Segments
 Overview of Segments
 Logical Space Management
 Locally Managed Tablespaces
 Dictionary-Managed Tablespaces
 Segment Space Management
 Automatic Segment Space Management
 Manual Segment Space Management
 Overview of Extents
 Allocation of Extents
 Autoallocate vs. Uniform
 Deallocation of Extents
 Storage Parameters for Extents
 Segment Storage Clause
 INITIAL
 NEXT
 PCTINCREASE
 MINEXTENTS
 MAXEXTENTS
 MAXSIZE 
 FREELISTS 
 FREELIST GROUPS 
 OPTIMAL
 BUFFER_POOL 
 FLASH_CACHE 
 ENCRYPT
 LOB Storage Characteristics for LOB Column or Attribute
 Example 
 Understand Deferred Segment Creation 
 Space Management Coordinator
 Segment Space and the High Water Mark
 References
 Knowledge Base Notes
 How To
 Documentation
References

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.