NFS Services Administrator's Guide

Troubleshooting NFS Services
Performance Tuning
Chapter 5 185
Diagnose NFS Performance Problems
1. Enter the following command on several of your NFS clients:
nfsstat -rc
2. If the timeout and retrans values displayed by nfsstat -rc are
high, but the badxid value is close to zero, packets are being dropped
before they get to the NFS server.
Try decreasing the values of the wsize and rsize mount options to
4096 or 2048 on the NFS clients. See “Changing the Default Mount
Options” on page 51.
See Installing and Administering LAN/9000 Software for
information on troubleshooting LAN problems.
3. If the timeout and badxid values displayed by nfsstat -rc are of
the same magnitude, your server is probably slow. Client RPC
requests are timing out and being retransmitted before the NFS
server has a chance to respond to them.
Try doubling the value of the timeo mount option on the NFS clients.
See “Changing the Default Mount Options” on page 51.