NFS Performance Tuning for HP-UX 11.0 and 11i Systems

nfs performance tuning for hp-ux 11.0 and 11i systems page 53

Notes:

Page 53July 22, 2002

nfsd

Troubleshooting nfsds (part 1)

• NFS Server Panics

Ø Analyze the crash dump with Q4 to determine root cause

• NFS Application Hangs

Ø Use rpcinfo(1M) command to “ping” nfsd daemons/threads

Ø Look for nfsd/nfsktcpd traffic in a network trace

Ø Examine the nfsd daemons/threads on the live system with Q4

Ø Monitor “nfsstat –s” output for nfsd/nfsktcpd traffic

Ø When all else fails, TOC the system and analyze dump with Q4

NFS Server Panics

Analyzing HP-UX system dumps is a complex and involved process, which is

typically performed by experienced HP support personnel or lab engineers.

NFS Application Hangs

The rpcinfo(1M) command can be used to “ping” the UDP/TCP daemons and

threads on the NFS server via the “-u” (UDP) and “-t” (TCP) options.

A network trace will show if any nfsds are responding to requests.

Q4 can be used by experienced system administrators or HP support personnel

to examine the running nfsd daemons/threads on the live system.

Successive nfsstat outputs can show whether outbound NFS replies are being

sent by the server.

When all else fails, the system might need to be TOC’d and the memory dump

analyzed by HP support personnel.