Poor NFS performance after recent update

[Kimi Ostro]

I am have a realy big issue with NFS. I updated my fileserver to
-STABLE as of 13th December and suffering poor NFS performance. before
I was transferring data at around 6-8MBps now it is 30KBps - yes
30KBps!!. also cause some mounted shares to lock up.

I thought it was the nve0 interface and swapped it for an fxp0. no
change. checked cables. no change.

What can I do to debug this further?

I feel as though I could take the binary bits and transfer them
quicker myself :(

-- 
Kimi