twp-oracle-database-in-memory-2245633
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Oracle Database In-Memory with Oracle
Database 12c Release 2
Technical Overview
ORACLE WHITE PAPER | MARCH 2017
ORACLE DATABASE IN-MEMORY WITH ORACLE DATABASE 12C RELEASE 2
Disclaimer
The following is intended to outline our general product direction. It is intended for information
purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any
material, code, or functionality, and should not be relied upon in making purchasing decisions. The
development, release, and timing of any features or functionality described for Oracle’s products
remains at the sole discretion of Oracle.
ORACLE DATABASE IN-MEMORY WITH ORACLE DATABASE 12C RELEASE 2
Table of Contents
Executive Overview 1
Intended Audience 1
Introduction 2
Oracle Database In-Memory Overview 3
Row Format vs. Column Format 3
The In-Memory Column Store 4
Dynamic Resizing and Automatic Memory Management 4
Populating the In-Memory Column Store 4
In-Memory Compression 6
In-Memory FastStart 8
In-Memory Scans 10
In-Memory Storage Index 10
SIMD Vector Processing 10
In-Memory Expressions 11
In-Memory Virtual Columns 11
Automatically Detected In-Memory Expressions 12
JSON Document Support 13
In-Memory Joins 13
Join Groups 15
In-Memory Aggregation 17
DML and the In-Memory Column Store 19
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