The name of this file is omi52.par. Its only purpose is to specify the bind array and read the array size that SQL*Loader should use. You can change these values so that they better suit your data volume.
readsize=1000000 bindsize=1000000
You must not add any other configuration options to this file. It is very important that the load operation is performed using the conventional path method; otherwise, the interface will not work properly.