[OBIEE 10g] BIServer Configuration And Tuning

 

BIServer Configuration and Tuning

Some important considerations for improving query performance with the Oracle BI Server.

NQSConfig.INI File Parameters

The NQSConfig.INI file contains configuration and tuning parameters for the Oracle BI Server. There are parameters to configure disk space for temporary storage, set sort memory buffer sizes, set cache memory buffers, set virtual table page sizes, and a number of other configuration settings that allow you to take full advantage of your hardware’s capabilities.

Aggregate Tables

You should use aggregate tables to improve query performance. Aggregate tables contains precalculated summarizations of data. It is much faster to retrieve an answer from an aggregate table than to recompute the answer from thousands of rows of detail. The Oracle BI Server uses aggregate tables automatically, if they have been properly specified in the repository.

Query Caching

Enabling query caching causes the Oracle BI Server to store query results for reuse by subsequent queries. Caching can dramatically improve the apparent performance of the system for users.

Tune and Index Underlying Databases

The Oracle BI Server sends queries to databases. For the queries to return in a timely manner, the underlying databases need to be configured, tuned, and indexed correctly. If there are queries that return slowly from the underlying databases, you can capture the SQL of the queries in the query log, then provide them to the DBA for analysis.