Reconfiguring nsswitch.conf / restart?

Hi,

About to reconfigure nsswitch.conf and changing to passwd: compat

The nsswitch.conf man page indicates:

NOTES
     Within each process that uses nsswitch.conf, the entire file
     is read only once; if the file is later changed, the process
     will continue using the old configuration.

Questions:

1) Do I need to reboot the system to make sure the change takes effect?

2) Or would restarting nscd suffice ?

3) or anything else that needs to be done?

Thanks In Advance