You're replying to a comment by Paul.

Paul Permalink
July 25, 2008, 20:08

So I frequently hear not to denormalize until it's been proven necessary. But in my experience, adding a column to a large MySQL table causes downtime. So my questions are:

1 am I doing the schema refactoring wrong?

2 if not, then wouldn't it be in my users interest to make some educated guesses and minimze downtime?

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