Follow these steps in sequence to resolve performance problems with your NFS server.
Use tools then observe the symptoms to pinpoint the source of the problem.
Measure the current level of performance for the network, server, and each client. See "Checking Network, Server, and Client Performance"."
Analyze the data gathered by graphing the data. Look for exceptions, high disk and CPU utilization, and high disk service times. Apply thresholds or performance rules to the data.
Tune the server. See Chapter 4, Configuring the Server and the Client to Maximize NFS Performance.
Repeat Steps 1 through 4 until you achieve the desired performance.