How to import more than one million rows from a MS Access database table and turn them into items?

What would be the best approach to import more than one million rows from a MS Access database table and turn them into items in Aras Innovator 11? Currently, the table is read in a server-side C# method, using an OleDbDataAdapter, and items with properties and relationships, representing each row's values, are being created. This approach works for a small number of rows, but it crashes when applied to all rows in a single method call.