Structure of the Chunk Free-List Page

In every chunk, the page that follows the last reserved page is the first of one or more chunk free-list pages that tracks available space in the chunk. For a non-root chunk, the initial length of the free space is equal to the size of the chunk minus three pages. If an additional chunk free-list page is needed to accommodate new entries, a new chunk free-list page is created in one of the free pages in the chunk. Figure 1 illustrates the location of the free-list page.

Use oncheck -pe to obtain the physical layout of pages in the chunk. For more information, see oncheck -ce, -pe: Check the chunk-free list.
Figure 1. Free-List Page
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