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Database pages
Derby tables
and indexes, known as conglomerates, consist of two or more pages.
A page is a unit of storage whose size is configurable on a system-wide,
database-wide, or conglomerate-specific basis. By default, a conglomerate
grows one page at a time until eight pages of user data (or nine pages of
total disk use, which includes one page of internal information) have been
allocated. (You can configure this behavior; see
"derby.storage.initialPages" in the
Derby Reference Manual.) After that, it grows
eight pages at a time.
The size of a row or column is not limited by the page size. Rows or columns
that are longer than the table's page size are automatically wrapped to overflow
pages.
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