yup. once upon a time we had a MySQL db on commodity hardware doing around 6K QPS with over 100M rows in the biggest table. you can't do much to it without taki

yup. once upon a time we had a MySQL db on commodity hardware doing around 6K QPS with over 100M rows in the biggest table. you can't do much to it without taking it offline, and even then you have no idea if/when the migration will complete.