High traffic NFS performance and availability problems

Aaron Glenn aaron.glenn at gmail.com
Fri Feb 18 03:07:16 PST 2005

On Thu, 17 Feb 2005 16:36:10 -0800, David Rice <drice at globat.com> wrote:
> The problems we are having is as follows.
> 1. Slow perfomance during peek traffic periods
> 2. Client boxes have high load averages and sometimes crashes due to slow NFS
> performance.
> 3. File servers that randomly crash with "Fatal trap 12: page fault while in
> kernel mode"
> 4. With soft updates enabled during FSCK the fileserver will freeze with all
> NFS processs in the "snaplck" state. We disabled soft updates because of
> this.
> I can provide and other details about our configuration if needed.
> David Rice
> drice at globat.com
> Thank You

Just how many MB/s are you pushing during peak periods? How are the
file servers connected to the clients? What have you looked it with
vmstat? Why did you move to 5.x on your file servers? Are you tracking
-STABLE on those, or just -RELEASE? By the way they're Xeon's - not
Xenon's (-:


More information about the freebsd-performance mailing list