NcFTPd general.cf file configuration
Don't forget to restart NcFTPd after modifying the general.cf file.
A legacy by-product exists from NcFTPd's original purpose in life, which was to run on a dedicated FTP server machine that only was for anonymous FTP. The server automatically nices itself, to give itself higher priority.
You can change this by setting the nice option. For regular priority, set it to 0; For higher, a negative number, and for lower priority than the other processes on the system, set it to a positive number. See the man page for nice(1) for more on what to set that to.