Odd network issues on ZFS based NFS server

[Peter Jeremy]

On 2010-Jun-09 14:25:17 +0200, Anders Nordby <anders at FreeBSD.org> wrote:
>Thanks. The only thing that (temporarily) solves this issue so far is
>rebooting, which helps only for a day or so. I have tried different
>NICs, replacing the physical server, replacing cables, changing and
>resetting switch ports. But it did not help, so I think this is a
>software problem. I will try zio_use_uma = 0 I think, and then try to
>limit vfs.zfs.arc_max to 100 MB or so.

I wonder if your system is running out of free RAM.  How would you
like to monitor "inactive", "cache" and "free" from either "systat -v"
or "vmstat -s" whilst the problem is occurring.

Does something like
  perl -e '$x = "x" x 10000000;'
temporarily correct the problem?

-- 
Peter Jeremy
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 196 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-fs/attachments/20100610/6adf7bc0/attachment.pgp