The following are changes in Oracle Database Administrator’s Guide for Oracle Database Release 21c.
New Features
The following features are new in this release.
Deprecated Features
The following features are deprecated in this release.
Desupported Features
The following features are desupported in this release.
Parent topic: Getting Started with Database Administration
1.1.1 New Features
The following features are new in this release.
Blockchain tables are tamper-proof, insert-only, tables that enable you to implement centralized blockchain applications.
See Managing Blockchain Tables.
Database Resident Connection Pooling (DRCP) can be configured at the PDB level.
See Enabling Database Resident Connection Pooling.
The attention log provides quick access to information about critical events that need action. Trace file records are classified based on the level of sensitivity of the record.
See Attention Log and Trace Files.
For Oracle Autonomous Database, the size of the sequence cache is dynamically computed based on the rate of usage of sequence numbers.
See About Automatic Sizing of the Sequence Cache.
You can enable automatic indexing at the table level.
See Configuring Automatic Indexing in an Oracle Database.
Transportable tablespace jobs can be restarted.
In Oracle Cloud environments, a PDB can be downsized by reducing the value of the CPU_MIN_COUNT parameter. The default value for JOB_QUEUE_PROCESSES across all containers is automatically derived from the number of sessions and CPUs configured in the system.
Password files created using older releases can be forced to use case sensitivity by migrating the password file to the new format.
SecureFiles segments can be shrunk thereby reclaiming unused space in SecureFiles segments and improving performance.
Parent topic: Changes on Oracle Database Release 21c for Oracle Database Administrator’s Guide
1.1.2 Deprecated Features
The following features are deprecated in this release.
Traditional auditing
Oracle recommends that you use unified auditing instead of traditional auditing. Unified auditing enables selective and more effective auditing inside the Oracle database.
Parent topic: Changes on Oracle Database Release 21c for Oracle Database Administrator’s Guide
1.1.3 Desupported Features
The following features are desupported in this release.
REMOTE_OS_AUTHENT initialization parameter
Parent topic: Changes on Oracle Database Release 21c for Oracle Database Administrator’s Guide
