Turbocharge your Database: Use the Oracle Database 10g SQLAccess Advisor

Dr. Lilian HobbsSummary Management Product Manager

Oracle Corporation

Session id: 40150

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Database Performance

Could your database run faster?

Do you have the best set of indexes?

Have you created any materialized views?

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Want to do this – But

Don’t have the time to gather the data

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Want to do this – But

Don’t have the time to gather the data

Workloads change so not sure what is best

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Want to do this – But

Don’t have the time to gather the data

Workloads change so not sure what is best

Not sure which indexes and mv’s to create

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Want to do this – But

Don’t have the time to gather the data

Workloads change so not sure what is best

Not sure which indexes and mv’s to create

Little experience creating mv’s but happy creating indexes

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SQL Access Advisor Overview

What indexes, MVs do I need to optimize my

entire workload?

SQL Access Advisor

Solution

Component of CBO

Provides implementation

script

No expertrequiredDBA

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What does it Recommend

Workload

Indexes Materialized ViewsMaterialized Views Log

SQL Access Advisor

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Based upon the Oracle 9i Advisor Part of Oracle Database 10g Server Mangeability Generates recommendations

– fast process, no long waits for information– choose recommendations to implement

automatically using OEM generate a SQL script

Interfaces– completely new GUI interface– command line

Try the SQLAccess Advisor

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Steps to use SQLAccess Advisor

Create a Task (transparent in Enterprise Manager)– optionally define parameters

Create a Workload– optionally define workload parameters

Generate Recommendations

Optionally implement recommendations

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Start Here - Advisor Central

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What is the Task

Task is where all results are stored Can keep tasks and their results In Enterprise Manager the task is

transparent– can give it a name

Configure a task as a template for new tasks (command line only)

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Workload

SQLAccess Advisor can use the following workload sources

– Current contents of the SQL cache– Hypothetical (specify schema(s) in the database)– User-Defined (in a table) – Add SQL statements to a workload

(command line only)

– Oracle 9i Advisor workload– SQL Tuning Sets

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Workload Source using Wizard

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SQL Tuning Sets

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Filtering

Don’t have to use the entire workload Filter by

– Application or module name– Number of SQL statements– Queries during a specified time window– Username– Tables

must be in this list not in this list

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Advanced Workload Options

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Recommendation Options

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Other Options

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Tuning Options

SQL statements will be tuned according to the resources they use

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Schedule the Job

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Final Review

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Monitor the Job

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Recommendations

SQLAccess Advisor wizard view by– Recommendations– SQL statements

Do not have to accept all recommendations Can modify object names and locations

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Review the Recommendations

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Review Recommendations Pt 2

Workload cost will not equal 100 because the cost is specific to a query

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View a Recommendation

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See the Statement

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Recommendations by SQL

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Recommendations by SQL Pt 2

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Tuning this SQL Statement

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Accepting Recommendations

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Show SQL Script

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Implement Recommendations

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The Command Line Interface

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Housekeeping

Don’t forget to – Change the expiration dates for tasks

and workloads if you want to keep them over 30 days

– Remove tasks and workloads when no longer required

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Features only available in the command line

Template tasks and workloads– Using or creating them

Adding/changing/deleting/searching SQL statements in a workload

Using an Oracle 9i workload Quick Tune of a single SQL statement

D E M O N S T R A T I O N

SQLAccess Advisor

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Want to do this now?

Try the Oracle 9i Advisor Functionality is very similar

– Only recommends materialized views

Different interface GUI available in OEM Can use 9i workloads with SQLAccess

Advisor

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Conclusion

SQLAccess Advisor can tune parts of the database that your DBA never knew was a problem

Easy and quick to use Build up a pattern of usage over time You choose what to implement See what the SQLAccess Advisor could do to

improve your system performance

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