Scarcity and Dimension control for top performers of the cubes
Hi allAccording to the Oracle support DOC-ID 985550.1 (Design of an OLAP Cube for performance and scalability) I'm little buit confused with indexing and Comporession diagram like statement below:
"You describe the rarity/storage of the cube in Analytic Workspace Manager (AWM) in the storage tab when creating the cube. When you set, first place the dense dimensions in the composite. Order sparse dimensions with those of dimension members less first. "
My question is: what do we mean by ' members of Dimension less? It is counted from number of levels in the dimension or the number of rows or number of attributes of size shot in AWM?
Also how to qualify as a particular dimension could be expected?
Thanks in advance,
DxP
The term ' members of dimension less ' in this context means the dimension with members less. For example, if you have defined and loaded a dimension called the PRODUCT, then the number of members is determined by
SELECT count(*)
FROM product_view
If you work in 11.2, so this review is more important because the AW will reorganize the dimensions of himself. Most of the cubes I've seen have all dimensions marked as rare, so it is a good starting point.
Tags: Business Intelligence
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