NFS server hostname not responding or slow response to commands when using NFS-mounted directories

nfsstat

User's path variable 

List directories on local file systems first, critical directories on remote file systems second, and then the rest of the remote file systems. 

NFS server hostname not responding or slow response to commands when using NFS-mounted directories 

nfsstat

Running executable from an NFS-mounted file system 

Copy the application locally (if used often).  

NFS server hostname not responding; badxid >5% of total calls and badxid = timeout

nfsstat -rc

Client times out before server responds 

Check for server bottleneck. If the server's response time isn't improved, increase the timeo parameter in the /etc/vfstab file of clients. Try increasing timeo to 25, 50, 100, 200 (tenths of seconds). Wait one day between modifications and check to see if the number of time-outs decreases.

badxid = 0

nfsstat -rc

Slow network 

Increase rsize and wsize in the /etc/vfstab file. Check interconnection devices (bridges, routers, gateways).