Memory usage

Another issue that can important is the choice CPVector (say the vector length of you machine) and the number of k-points processed together during the calculation of the parameters. In the output you see the used value

                   =========================
                   = Numerical Integration =
                   =========================


 TOTAL NR. OF POINTS                                   4738
 BLOCK LENGTH                                           256
 NR. OF BLOCKS                                           20
 MAX. NR. OF SYMMETRY UNIQUE POINTS PER BLOCK            35
 NR. OF K-POINTS PROCESSED TOGETHER IN BASPNT             5
 NR. OF SYMMETRY OPERATORS (REAL SPACE)                  48
 SYMMETRY OPERATORS IN K-SPACE                           48

If you want to change the default settings you should specify both CPVector and KGRPX. The optimal combination depends on the calculation and on the machine and bigger is not necessarily better. Example

CPVector 1024
KGRPX 3