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The favorite Oracle 10g New Features

Oracle Tips by Burleson Consulting


With all of the hoopla surrounding the impending release of Oracle10g, it is sometimes difficult to differentiate between the truly valuable features and the marginal new features. For more information on Oracle10g new features, I recommend the premier book Oracle Database 10g new features, by Mike Ault, Daniel Liu and Madhu Tumma.

On one hand, Oracle10g is more complex and robust than previous database versions with its wealth of new tuning options, sophisticated tuning tools and enhanced tuning parameters. On the other hand, it is simpler than any Oracle database before it. At your option, you can disable much of the flexibility (and complexity) of Oracle and create an easy to maintain system that requires little experienced human intervention.

10g provides a wealth of features that can be used to automate almost every aspect of its database administration. It is important to note that these automation features are optional, and they are not intended to replace standard DBA activities. Rather, the Oracle10g automation features are aimed at shops that do not have the manpower or expertise to manually perform the tasks.

Let's take a closer look at my favorite 10g new features.

Automatic Workload Repository

Automatic Workload Repository (AWR) defaults to a collection interval every 30 minutes and collects data that is the foundation for all of the other self-tuning features. AWR is very much like STATSPACK, especially the level-5 STATSPACK collection mechanism where top SQL is collected every hour, based on your rolling thresholds for high-use SQL. In addition to the SQL, AWR collects detailed run-time statistics on the top SQL (disk reads, executions, consistent gets) and uses this information to adjust the rolling collection threshold. This technique ensures that AWR always collects the most resource-intensive SQL.

Automatic Maintenance Tasks

The Automatic Maintenance Tasks (AMT) automate the routine tasks of refreshing statistics when they become stale, and rebuilding indexes when they become sub-optimal. The AMTs are scheduled for execution inside the new Oracle10g Unified Scheduler (US), providing a primitive DBA functionality.

Automatic Storage Management

The Automatic Storage Management (ASM) feature allows for the automatic stripe-and-mirror everywhere approach to be used to automatically load balance the disk I/O subsystem and remove the need for the DBA to specify physical file locations when allocating a tablespace.

Automated features aside, there are other new 10g features that I find especially intriguing.

Server Generated Alerts

Server Generated Alerts (SGA) interfaces with the US to send e-mail messages when an external problem is impeding Oracle performance. External problems might include a UNIX mount point that is full, causing a failure of ASM files to extend or a RAM shortage with the System Global Area.

Summary

Oracle10g is one of the most important new releases of Oracle in many years. The advent of Oracle10g will definitely broaden the footprint of Oracle in the small to mid-sized market, plus provide the Oracle DBA with a wealth of highly-intelligent new features to simplify database administration.

 

If you like Oracle tuning, you may enjoy my new book "Oracle Tuning: The Definitive Reference", over 900 pages of BC's favorite tuning tips & scripts. 

You can buy it direct from the publisher for 30%-off and get instant access to the code depot of Oracle tuning scripts.


 

 

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Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

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