Oracle 11GR2 version has significant improvements over Oracle 11GR1 version
by providing a series of specific capabilities and product enhancements targeted
for consolidation, migration of databases to lower the costs of Database
management. In addition, Oracle11GR2 continues to add features and
capabilities that extends existing investment in mission-critical infrastructure .
Oracle11GR2 has been designed with focus on certain key development areas.
These areas are:
Business Intelligence and Datawarehousing
Automatic Storage Management
Agent Development Framework - Oracle Clusterware provides an agent framework for
managing all kinds of applications with Oracle Clusterware. Using the agent framework
provides optimized application startup, checking, and stopping based on user-defined
scripts. This feature helps save money and reduces costs efficiently enabling high
availability for applications using Oracle Clusterware. (11gR2)
Out-of-Place Oracle Clusterware Upgrade - A new version of Oracle Clusterware is now
installed into a separate home from the current installation. This reduces the downtime
required to upgrade a node in the cluster and facilitate the provisioning of clusters within
an enterprise. (11gR2)
Cluster Time Service - The Cluster Time Service synchronizes the system time on all
nodes in the cluster. A synchronized system time across the cluster is a prerequisite to
install and successfully run an Oracle cluster. (11gR2)
Configuration Assistant Support for Removing Oracle RAC Installations. (11gR2)
Configuration Assistants Support New Oracle RAC Features. (11gR2)
Downgrading Database Configured With DBControl. (11gR2)
Enhanced Cluster Verification Utility. (11gR2)
Enterprise Manager Provisioning for Oracle Clusterware and Oracle Real Application
Clusters - Enterprise Manager provisioning introduces procedures to easily scale.
Enterprise Manager Support for Grid Plug and Play. (11gR2)
Enterprise Manager Support for Oracle Restart. (11gR2)
Enterprise Manager-Based Clusterware Resource Management. (11gR2)
Grid Plug and Play (GPnP). (11gR2)
Improved Clusterware Resource Modeling. (11gR2)
Integration of Cluster Verification Utility (CVU) and Oracle Universal Installer (OUI).
Java API for Oracle RAC FAN High Availability Events. (11gR2)
Oracle Cluster Registry (OCR) Enhancements. (11gR2)
Faster relocation of services on node failure.
Oracle Clusterware now supports up to 5 copies of the OCR for improved availability of
OCR can now be stored in Automatic Storage Management (ASM).
Oracle Restart Integration with Oracle Universal Installer. (11gR2)
Oracle Universal Installer Support for Removing Oracle RAC Installations. (11gR2)
OUI Support for Out-of-Place Oracle Clusterware Upgrade. (11gR2)
Patch Application with DBControl. (11gR2)
Policy-Based Cluster and Capacity Management. (11gR2)
Role-Separated Management - Role-separated management for Oracle Clusterware
allows certain administrative tasks to be delegated to different people, representing
different roles in the company. It is based on the idea of a clusterware administrator.
Server Control (SRVCTL) Enhancements. (11gR2)
Server Control (SRVCTL) Enhancements to Support Grid Plug and Play. (11gR2)
SRVCTL Support for Single-Instance Database in a Cluster. (11gR2)
UCP Integration with Oracle Data Guard. (11gR2)
UCP Integration with Oracle Real Application Clusters. (11gR2)
Universal Connection Pool (UCP) for JDBC. (11gR2)
Zero Downtime Patching for Oracle Clusterware and Oracle RAC. (11gR2
Database QoS Management Support. (11gR2)
Database Quality of Service (QoS) Management Server (11gR2)
Enterprise Manager QoS Management Integration. (11gR2)
RAC - 70% faster (ADDM has a better global view of the RAC cluster). (11gR1)
Streams - 30-50% faster. (11gR1)
Optimizer stats collection – 10X faster. (11gR1)
Query results caching - 25% faster. (11gR1)
Table Scans 2.5x Faster using advance compression. (11gR1)
OLAP-based Materialized Views for fast OLAP CUBE building. (11gR1)
New In-Memory Database Cache, Data cached in application memory, fast and
consistent response times and a standard SQL interface.
Result caches - new memory areas in the SGA for storing SQL query results, PL/SQL
function results and OCI call results. (11gR1)
Invisible indexes - indexes that are ignored by the optimizer. Handy for testing without
Oracle secure files – 5X faster than normal file systems. (11gR1)
No need to have a C-compiler installed to use Native PL/SQL Compilation. (11gR1)
Stored Outlines Migration for SQL Plan Management - Stored outlines can be migrated
for future and enhanced usage with SQL Plan Management (SPM).
Support for 4 KB Sector Disk Drives - Today, disk drives have 512 byte sectors. Disk
drive manufacturers are moving to 4 KB sector drives because it allows them to offer
higher capacity with lower overhead.
Client Result Cache Using Table Annotations Support - enables applications to leverage
client and server result caching through deployment time knobs as opposed to making
application changes. In addition, this feature provides automatic client cache invalidation.
Segment Creation on Demand (11gR2) - The initial segment creation for non partitioned
tables and indexes can be delayed until data is first inserted into an object.
System-Managed Indexes for List Partitioning Tables. (11gR2)
Zero-Size Unusable Indexes and Index Partitions (11gR2) - Unusable indexes and
index partitions do not consume any space in the database anymore; they become
Ability to apply many patches on-line without downtime (RAC and single instance
Data recovery advisor - quickly identify the root cause of failures; auto fix or present
recovery options to the DBA. (11gR1)
ASM Preferred Mirror Read/ Faster Mirror Resync. (11gR1)
XA transactions spanning multiple servers. (11gR1)
Improved runtime connection load balancing. (11gR1)
Flashback Transaction/ Oracle Total Recall. (11gR1)
Automatic Block Repair - Automatic block repair allows corrupt blocks on the primary
database or physical standby database to be automatically repaired, as soon as they
are detected, by transferring good blocks from the other destination. (11gR2)
Backup to Amazon Simple Storage Service (S3) Using OSB Cloud Computing. (11gR2)
DUPLICATE Without Connection to Target Database. (11gR2)
Enhanced Tablespace Point-In-Time Recovery (TSPITR). (11gR2)
New DUPLICATE Options:
o NO REDO (11gR2)
o UNDO TABLESPACE <ts_name> [, <ts_name> …] (11gR2)
New SET NEWNAME Clauses and Format Options (11gR2)
Tablespace Checks in DUPLICATE. (11gR2)
New Oracle Streams Features like (11gR2):
o XStream In - Extended Streams Inbound (XStream In) provides a high performance,
transaction-based interface to Oracle Streams for information exchange from non-Oracle
databases or file systems.
o XStream Out - Extended Streams Outbound (XStream Out) provides a high
performance, transaction-based interface to Oracle Streams for information exchange to
non-Oracle databases or file systems.
Support for case sensitive and multi-byte passwords (disable by setting
SEC_CASE_SENSITIVE_LOGON initialization parameter to FALSE. (11gR1)
Transparent Data Encryption (support for tablespace level encryption). (11gR1)
Hardware based master key protection. (11gR1)
Encrypt backups. (11gR1)
Kerberos authentication - strong passwords. (11gR1)
Add Multi-factor DBA controls with Data Vault. (11gR1)
Tablespace Master Key Re-Key (11gR2) - Oracle Advanced Security capability allows
customers to change the master key used to protect the encryption keys used to encrypt Oracle
New MEMORY_TARGET parameter for Automatic memory tuning. (11gR1)
Enterprise Manager Support Workbench for ASM. (11gR2)
New Gateway Support (11gR2)
EMCA Supports New Oracle RAC Configuration for EM. (11gR2)
SQL monitoring (11gR2) - Monitoring the progress of long-running SQL statements at
the XPlan level.
Automatic Patching of Time Stamp with Time Zone Data. (11gR2)
Prevent Data Loss for Time Zone with Local Time Zone Data Type. (11gR2)
Enterprise Manager Integration with ASM Optimal Disk Placement. (11gR2)
Enterprise Manager Support for ASM Cluster File System (ACFS). (11gR2)
Business Intelligence and Data Warehousing
Allow Virtual Columns in the Primary Key or Foreign Key for Reference Partitioning.
Analytic Functions 2.0. (11gR2)
EXECUTE Privilege for DIRECTORY Objects. (11gR2)
In-Memory Parallel Query. (11gR2)
Minimal Effort Parallel Execution - Auto Degree of Parallelism (DOP) and Queuing.
Preprocessing Data for ORACLE_LOADER Access Driver in External Tables. (11gR2)
Recursive WITH Clause. (11gR2)
Significant Performance Improvement of On-Commit Fast Refresh. (11gR2)
ASM – 11GR2 Automatic Storage Management
ASM Cluster File System (ACFS) (11gR2) - The ASM Cluster File System (ACFS)
extends Automatic Storage Management (ASM) by providing a robust, modern, general
purpose file system for files beyond the Oracle database files. ACFS provides support
for files such as Oracle binaries, report files, trace files, alert logs, and other application
ASM Dynamic Volume Manager (DVM) (11gR2) - is a kernel-loadable device driver that
provides a standard device driver interface to clients (for example, ACFS). File systems
or other processes can do I/O to this device driver as they would to any other disk device
driver on the system.
ASM FS Snapshot (11gR2) - is a point-in-time copy of a file system and can
provide up to 64 snapshot images as read only and can be used to view a file
system as of point in time in the past when they were created. These
snapshots can be used as a backup and to restore files which have been
deleted by mistake.
Enterprise Manager Integration for ASM File Access Control. (11gR2)
Oracle Cluster Registry (OCR) and Voting Disk on ASM. (11gR2)
ASM Optimal Disk Placement (ODP). (11gR2) - Oracle has been sitting together with
storage vendors and found ways to enable ASM to make use of storage
intelligence features. As of Oracle 11gR2 it is possible to specify on which disk
regions the ASM Disks will be placed. This enables us to make use of faster disk
zones on the outer regions of disks for better I/O performance.
ASMCMD Command Extensions (11gR2) - The ASMCMD tool is extended to include
management of ASM disks, disk groups, and ASM instance in addition to managing
Automatic Storage Management (ASM) File Access Control. (11gR2)
Fast mirror resync after temporary connectivity lost. (11gR1)