How query read aggregate???

Experts !
I have problem with my aggregate design.
i have created one aggregate on one of my cube. when i try to check using rsrt in debug mode, looks like that query is not hitting the aggregate which i have just created. it goes to another aggregate.
Now, does it mean that query will always go to the same aggregate ? or when users pulls different characteristics from free charastericts , my query might jump to another aggregates ??
OR, At the beginig whatever aggregate it hits, the query will only stick to that !
hows the process works ?
thanks

When youu2019re not sure how to design a good aggregate. Let the system propose for you but you have to use the cube in question for some time. The reason is the system need to gather statistics, before it can propose a good one for you.
Designing an aggregate (drag and drop) is easy, but designing a good one is not as easy as it looks. It requires some skills. But the good news is that skills can be learned.
When you execute a query, OLAP Processor will look for data (based on the criteria) in the following order.
Local OLAP Cache
Global OLAP Cache
Aggregate
Cube
The goal is the OLAP Processor should hit either of the first 3 guys, then bingo ! good hit. But if all of them are missed , it has to go to the cube to fetch the data. Then it defeats the purpose of aggregate.
Remember the main purpose of aggregate is speeding up data retrieval. But there is associated overhead. You should check the rating and delete bad aggregates.
Cheers.
Jen

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1.
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2.
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For example :
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SAMSUNG              TEBBGL               16/01/2012    XASE
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17 ;
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Message was edited by:
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Message was edited by:
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Edited by: Mayank Chauhan on Feb 8, 2011 11:45 AM
Edited by: Mayank Chauhan on Feb 8, 2011 11:46 AM
Edited by: Mayank Chauhan on Feb 8, 2011 11:47 AM

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How query read aggregate???

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