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6.0

Slow NFS Performance

Asked by aaamr in Unix Networking

Tags: nfs, slow

We moved our office a few weeks ago, and as part of that move, re-ip'd the whole environment from a 10.0.0.x range to a 192.168.0.x range.

Since then, we've had performance issues on Solaris, AIX, and HP-UX NFS clients.  Our linux clients are as well-behaved as they ever were.

We get a lot of RPC timeouts, and very slow performance on the NFS mounted directories.  Have tried playing with vers=2/vers=3 and tweaking the wsize/rsize params, but so far, no luck.

Looking for any suggestions or ideas...  Since the linux environments remain fast, I think we can safely rule out a network or hardware issue, so I'm thinking it's on the nfs clients themselves.

netstat -i shows no collisions on the interfaces themselves.

nfsstat from the client shows a lot of badcalls and badxids:

# nfsstat -rc

Client rpc:
Connection oriented:
calls      badcalls   badxids    timeouts   newcreds   badverfs   timers
27347      2599       537        2563       0          0          0
cantconn   nomem      interrupts
0          0          17
Connectionless:
calls      badcalls   retrans    badxids    timeouts   newcreds   badverfs
9          1          0          0          0          0          0
timers     nomem      cantsend
6          0          0



Finally, a truss of a cp from an NFS mount to local disk on the client hangs on the following line:

write(4, 0xFE800000, 8388608)   (sleeping...)


We have a fairly heterogenous environment, and the NFS servers in question are a linux-based Snap Server, and a stock Solaris 8 box with clients running linux, solaris, HP-UX, and AIX.  None of these issues were present in the old environment, and the linux clients are all still happy.

Looking for any ideas...



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Zone: Unix Networking
Tags: nfs, slow
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Solution Provided By: gheist
Participating Experts: 2
Solution Grade: A
 
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