tmp, 20.01.2010 11:25: >> http://www.postgresql.org/docs/8.4/static/storage-page-layout.html > > I fail to find the size of the *row* header on that link. > "All table rows are structured in the same way. There is a fixed-size header (occupying 23 bytes on most machines), followedby an optional null bitmap, an optional object ID field, and the user data. The header is detailed in Table 53-4." http://www.postgresql.org/docs/8.4/static/storage-page-layout.html#HEAPTUPLEHEADERDATA-TABLE
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Соглашаюсь с условиями обработки персональных данных