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Outfile Using too much disk space
Posted by: Jamie Koc
Date: October 07, 2010 11:49AM

I am dumping a myisam table with 300 million records using outfile (table size is 40G) with an select * from table order by. The server starts with 400G free and as I watch the process run, the server space drops down to 80G free. Why does MySQL need around 8 times as much disk space to perform a sort on a 40G table?

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