Aggregate storage database outlines are pageable. This feature may significantly reduce memory usage for very large database outlines. For aggregate storage databases, Essbase preloads part of the database outline into memory. Then, during data retrieval, Essbase pages other parts of the outline into memory as required.
When you create an aggregate storage database, the outline is created in a pageable format. When you use the Aggregate Storage Outline Conversion Wizard to convert an existing block storage outline to aggregate storage, the outline is automatically converted to a pageable format.
Paging an outline into memory enables Essbase to handle very large outlines (for example, 10 million or more members) but potentially increases data retrieval time. You can customize outline paging to obtain the optimum balance between memory usage and data retrieval time. See Optimizing Outline Paging.