how to speed up the loading of data into a table

Good afternoon, I have 2 questions : - 1st question  I have a csv file with 300000000 million lines. when I load it in a MonetDB table, it takes more than 16 hours, whereas in Oracle it only takes 15 minutes. Where is the problem? I use mclient as follows :? mclient -u user1 -d demo -ims -s " COPY 300000009 RECORDS INTO LINEORDER FROM STDIN USING DELIMITERS '|','\n'" - < D:\SSB\LINEORDER.tbl ?for information I use : MonetDB5 Windows Memory : 16 Go There are two constraints : primary key and foreign key on the table prior to loading data? 2nd question : how inner joins are made in MongoDB? cordialy.