Page_Buffers=n

    Specifies the number of buffers to be allocated for each database
    file to be copied. The number of buffers used is twice the
    number specified; half are used for reading the file and half
    for writing the copy. Values specified with the Page_Buffers
    qualifier can range from 1 to 5. The default value is 3. Larger
    values might improve performance, but they increase memory use.