|Oracle® Database Administrator's Guide
10g Release 1 (10.1)
Part Number B10739-01
This section describes new features of Oracle Database 10g Release 1 (10.1) and provides pointers to additional information. New features information from previous releases is retained to help users upgrading to the current release.
For a summary of all new features for Oracle Database 10g Release 1 (10.1), see Oracle Database New Features. This section describes the new features discussed in the Oracle Database Administrator's Guide.
These are the features introduced in the current release.
Server manageability features are introduced in "Server Manageability".
Automatic system task maintenance is discussed in Chapter 23, " Managing Automatic System Tasks Using the Maintenance Window".
Oracle Database lets you create single-file tablespaces, called bigfile tablespaces, which can contain up to 232 or 4G blocks. The benefits of bigfile tablespaces are the following:
They significantly enhance the storage capacity of an Oracle Database.
They reduce the number of datafiles needed for an ultra large database.
They simplify database management by providing datafile transparency.
Multiple default temporary tablespace support for SQL operations
You can create a temporary tablespace group that can be specifically assigned to users in the same way that a single temporary tablespace is assigned. A tablespace group can also be specified as the default temporary tablespace for the database.
RENAME TO clause of the
ALTER TABLESPACE statement enables you to rename tablespaces.
Cross-platform transportable tablespaces
Tablespaces can be transported from one platform to another. The RMAN
CONVERT command is used to do the conversion.
Oracle Database creates an auxiliary system tablespace called
SYSAUX at database creation. This tablespace can be used by various Oracle Database features and products, rather than saving their data in separate tablespaces or in the
Automatic Storage Management
Automatic Storage Management provides a logical volume manager integrated with Oracle Database, eliminating the need for you to purchase a third-party product. Oracle Database creates Oracle-managed files within user-defined disk groups that provide redundancy and striping.
DROP DATABASE statement lets you delete a database and all of its files that are listed in the control file.
Oracle Flashback Transaction Query
This feature introduces the
FLASHBACK_TRANSACTION_QUERY view, which lets you examine changes to the database at the transaction level. As a result, you can diagnose problems, perform analysis, and audit transactions.
Oracle Flashback Version Query
Using undo data stored in the database, you can now view multiple changes to one or more rows, along with the metadata for the changes.
Oracle Flashback Table
TABLE statement lets you quickly recover a table to a point in time in the past without restoring a backup.
Oracle Flashback Drop
Oracle Database now provides a way to restore accidentally dropped tables. When tables are dropped, they are placed into a recycle bin from which they can later be recovered.
Enhanced online redefinition
New procedures have been added to the
DBMS_REDEFINITION package that automate the cloning of dependent objects such as indexes, triggers, privileges, and constraints. Some restrictions have been lifted, allowing more types of tables to be redefined.
Automatic statistics collection
You no longer need to specify the
MONITORING keyword in the
CREATE TABLE or
ALTER TABLE statement to enable the automatic collecting of statistics for a table. Statistics are now collected automatically as controlled by the
STATISTICS_LEVEL initialization parameter. Automatic statistics collection is the default.
Oracle Database provides advanced scheduling capabilities through the database Scheduler.
Database Resource Manager enhancement
The following are enhancements to the Database Resource Manager:
Adaptive consumer group mapping
You can configure the Database Resource Manager to automatically assign consumer groups to sessions by providing mappings between session attributes and consumer groups.
New plan directives
New resource plan directives let you set idle timeouts, cancel long-running SQL statements, terminate long-running sessions, and restore sessions to their original consumer group at the end of a top call.
Two new resource manager policies have also been added: the
RATIO CPU allocation policy and the
RUN_TO_COMPLETION scheduling policy.
New initialization parameter
RESUMABLE_TIMEOUT initialization parameter lets you enable resumable space allocation and set a timeout period across all sessions.
Tuning by "service and SQL" augments tuning by "session and SQL" in the majority of systems where all sessions are anonymous and shared.
See "Defining Application Services for Oracle Database 10g " and Oracle Database Performance Tuning Guide for more information.
Simplified recovery through resetlogs
The format for archive log file naming, as specified by the
ARCHIVE_LOG_FORMAT initialization parameter, now includes the resetlogs ID, which allows for easier recovery of a database from a previous backup.
Automated shared server configuration and simplified shared server configuration parameters.
You no longer need to preconfigure initialization parameters for shared server. Parameters can be configured dynamically, and most parameters are now limiting parameters to control resources. The recommended method for enabling shared server now is by setting
SHARED_SERVERS initialization parameter, rather than the
DISPATCHERS initialization parameter.
Consolidation of session-specific trace output
For shared server sessions, the
trcsess command-line utility consolidates in one place the trace pertaining to a user session.
Block remote access to restricted instances
Remote access to a restricted instance through an Oracle Net listener is blocked.
Dynamic SGA enhancements
JAVA_POOL_SIZE initialization parameter is now dynamic. There is a new
STREAMS_POOL_SIZE initialization parameter, which is also dynamic. A new view,
V$SGAINFO, provides a consolidated and concise summary of SGA information.
Irreversible database compatibility
In previous releases you were allowed to lower the compatibility setting for your database. Now, when you advance the compatibility of the database with the
COMPATIBLE initialization parameter, you can no longer start the database using a lower compatibility setting, except by doing a point-in-time recovery to a time before the compatibility was advanced.
Flash recovery area
You can create a flash recovery area in your database where Oracle Database can store and manage files related to backup and recovery.
Sorted hash clusters
Sorted hash clusters are new data structures that allow faster retrieval of data for applications where data is consumed in the order in which it was inserted.
Copying Files Using the Database Server
You do not have to use the operating system to copy database files. You can use the
DBMS_FILE_TRANSFER package to copy files.
MAXTRANS physical attribute parameter
MAXTRANS physical attribute parameter for database objects has been deprecated. Oracle Database now automatically allows up to 255 concurrent update transactions for any data block, depending on the available space in the block.
Deprecation of use of rollback segments (manual undo management mode)
Manual undo management mode has been deprecated and is no longer documented in this book. Use an undo tablespace and automatic undo management instead.
Deprecation of the
UNDO_SUPPRESS_ERRORS initialization parameter
When operating in automatic undo management mode, the database now ignored any manual undo management mode SQL statements instead of returning error messages.
Deprecation of the
PARALLEL_AUTOMATIC_TUNING initialization parameter
Oracle Database provides defaults for the parallel execution initialization parameters that are adequate and tuned for most situations. The
PARALLEL_AUTOMATIC_TUNING initialization parameter is now redundant and has been deprecated.
Removal of LogMiner chapter
The chapter on LogMiner has been moved to Oracle Database Utilities
Removal of job queues chapter on using the
DBMS_JOB package to submit jobs has been replaced by Scheduler functionality.