单项选择题 You have a server that has very limited memory but has a very large table. You will use mysqldump to back up this table. Which option will ensure mysqldump will process a row at a time instead of buffering a set of rows?（）

多项选择题 Which three tasks can be performed by using the performance Schema?（）

多项选择题 Which three statements are true about memory buffer allocation by a MySQL Server?（）