Changes in This Release for Oracle Database Performance Tuning Guide
This preface contains:
Changes in Oracle Database Release 21c, Version 21.1
The following are changes in Oracle Database Performance Tuning Guide for Oracle Database release 21c, version 21.1.
New Features
The following features are new in this release:
-
Auto-Result Cache, settings to determine eligible queries for storing the result sets in the server and client result caches.
Note:
See Setting the Result Cache Mode -
Directly Mapped Buffer Cache Support
-
In-Memory Hybrid Scans
Note:
A multitenant container database is the only supported architecture in Oracle Database 20c. While the documentation is being revised, legacy terminology may persist. In most cases, "database" and "non-CDB" refer to a CDB or PDB, depending on context. In some contexts, such as upgrades, "non-CDB" refers to a non-CDB from a previous release.
Desupported Features
Note:
A multitenant container database is the only supported architecture in Oracle Database 20c. While the documentation is being revised, legacy terminology may persist. In most cases, "database" and "non-CDB" refer to a CDB or PDB, depending on context. In some contexts, such as upgrades, "non-CDB" refers to a non-CDB from a previous release.