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Database Page

Databases read and write storage in fixed-size pages (commonly 8 KB), each holding many rows or index entries; a page is the atomic unit of IO and caching. Costs are counted in pages touched, not rows, which is why row size and locality matter.

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How Databases Store Data on Disk

This concept covers how database systems persist data to disk files, building from binary encoding of numeric and complex data types up to the on-disk file and page layout used to store B-tree struct…