I have a database that I use to mine a "primary" 20-column table with 18 million rows and growing by about 2 million a week, and that may accelerate. I am working to pre-process data by running PHP ...
We have 14 GB worth of CSV's which total 138 million rows. I imported this into a MySQL table first with InnoDB, and then tried again with MyISAM. In both cases, a simple SELECT on primary key ...