That’s a global VM setting, which is also going to affect your other filesystems, which may or may not be a concern.

You might also consider — I’m not testing these, but would expect that it should work:

• Passing the sync mount option. That will use no write caching for that filesystem, which may impact performance more than you want.

• Increasing the NFS mount options timeo= or retrans=. These will avoid having the client time out and decide that the NFS server is taking excessively long (though an operation may still take longer to complete if the NFS server is taking a while to respond).