Sunil S. Ranka's Weblog

Superior Data Analytics is the antidote to Business Failure

Measure the performance of the OBIEE components

Posted by sranka on December 3, 2010

1. There is a very useful BIEE tool for performance monitoring :

http:/:9704/analytics/saw.dll?perfmon

2.This is a checklist to make sure you aren’t committing any design infractions – this doesn’t cover the performance of your network or database sources.

Work on performance from the TOP DOWN! If you are modifying the NQSConfig.INI first you are going the wrong .

OBIEE Performance Checklist

Using aggregates
-Enabling OBI to generate queries against smaller, summarized tables

Constraining results using a WHERE clause
-Limiting the rows returned from a data source

Caching
-Fulfilling a query from a local cache as opposed to processing the query through a data source

Limiting the number of initialization blocks
-Initialization block queries are executed when OBI is started and when users log in

Limiting select table types (opaque views)
-Reduces the number of SELECT statements executed by OBI
-May avoid lengthy SQL queries Modeling dimension hierarchies correctly
-Ensuring the OBI chooses the most economical source

Turning off logging
-No overhead for OBI to generate log files

Setting query limits
-Enabling OBI to track and cancel runaway queries

Pushing calculations to the database
-Automatically pushing certain operations to the database based on database feature entries

Exposing materialized views in Physical layer
-Exposing materialized views explicitly guarantees that OBI choose the most economical table source to satisfy a query

Using database hints
-Forcing the database query optimizer to execute the statement in a more efficient way

Setting the NQSConfig.ini parameters
-Setting parameters that affect OBI performance:
—SORT_MEMORY_SIZE: specifies the maximum amount of memory to be used for each sort operation
—SORT_BUFFER_INCREMENT_SIZE: specifies the increment by which the sort memory is increased as more memory is needed
—VIRTUAL_TABLE_PAGE_SIZE: specifies the size of a memory page for OBI internal processing

 

Hope This Help
Sunil S Ranka
“Superior BI is the antidote to Business Failure”

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One Response to “Measure the performance of the OBIEE components”

  1. rnm1978 said

    Hey Sunil,

    Re. perfmon, I’ve just blogged about this in detail here.

    cheers, Robin.

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