NFS Services Administrator's Guide

Troubleshooting NFS Services
Performance Tuning
Chapter 8 339
Server busy. Try again.
for one of the following reasons:
The server is busy synchronizing and checkpointing its
directories. Just wait until the server is finished checkpointing
and try the command again.
The server is out of swap or disk space. Increase the swap space
on the server, and then checkpoint the server’s directories with
nisping -Ca.