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Adaptive Server pages

The size of Adaptive Server‘s logical pages (2K, 4K, 8K, or 16K) determines the server’s space allocation. Each allocation page, object allocation map (OAM) page, data page, index page, text page, and so on
are built on a logical page. For example, if the logical page size of Adaptive Server is 8K, each of these page types are 8K in size. All of these pages consume the entire size specified by the size of the logical page. OAM pages have a greater number of OAM entries for larger logical pages (for example, 8K) than for smaller pages (2K).

The logical page size is a server-wide setting; you cannot have databases with varying size logical pages within the same server. All tables are appropriately sized so that the row size is no greater than the current page size of the server. That is, rows cannot span multiple pages.

Check the Sybase Wiki @ sybasewiki.com
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