JDBC Batch Insert OutOfMemoryError

Question

I have written a method insert() in which I am trying to use JDBC Batch for inserting half a million records into a MySQL database:

Answer 1

It is out of memory because it hold all the transaction in memory and only send it over to the database when you call executeBatch.

If you don't need it to be atomic and would like the get better performance, you can keep a counter and call executeBatch every n number of records.