[CentOS] Excessive NFS operations

[nate]

lhecking at users.sourceforge.net wrote:
>
>  Reading the "waiting IOs" thread made me remember I have a similar problem
>  that has been here for months, and I have no sulution yet.
>
>  A single CentOS 5.2 x86_64 machine here is overloading our NetApp filer
> with
>  excessive NFS getattr, lookup and access operations. The weird thing is
>

There was a kernel update in the 5.2/5.3 time frame that
fixed a NFS client bug regarding lookups, what kernel are you
running?

Have you tried running lsof on the client side to see which
processes are using the files served over NFS?

nate