Hi,
Not a NetApp guy myself but I think I've seen the same article as you described before whilst looking at something related to NFS. I'm fairly confident that depending on your setup NetApp recommend that setting too - it might have been someone on the communities who said they were using it in production when they were troubleshooting something. I assume this is the KB you were talking about?
Are you seeing the exact symptoms? If so then I'd perhaps investigating it further and applying it!