I've recently started getting these errors:
Nblade.cifsMaxWatchesPerTree: Received too many Change Notify requests on one tree: clientIP:port 192.168.1.51:57914, directory "<directory>" on share "<CIFS share>".
In here: https://library.netapp.com/ecmdocs/ECMP12452955/html/vserver/cifs/options/show.html
You can set -max-watches-set-per-tree... what is the effect of changing this?