Physical storage of data in Access 2007

Posted by ste on Stack Overflow See other posts from Stack Overflow or by ste
Published on 2010-03-20T21:46:54Z Indexed on 2010/03/20 21:51 UTC
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ms-access

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ms-access-2007

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database

I've been trying to estimate the size of an Access table with a certain number of records.

It has 4 Longs (4 bytes each), and a Currency (8 bytes).

In theory: 1 Record = 24 bytes, 500,000 = ~11.5MB

However, the accdb file (even after compacting) increases by almost 30MB (~61 bytes per record). A few extra bytes for padding wouldn't be so bad, but 2.5X seems a bit excessive - even for Microsoft bloat.

What's with the discrepancy? The four longs are compound keys, would that matter?

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