NFS on ZFS pure SSD pool

[Sam Fourman Jr.]

On Thu, Aug 29, 2013 at 9:49 AM, Rick Macklem <rmacklem at uoguelph.ca> wrote:

> Sam Fourman Jr wrote:
> >
> >
> >
> >
> >
> >
> > On Wed, Aug 28, 2013 at 2:27 PM, Eric Browning <
> > ericbrowning at skaggscatholiccenter.org > wrote:
> >
> >
> > Rick,
> >
> > Sam and I applied the patch (kernel now at r254983M) and set
> > vfs.nfsd.tcphighwater=5000
> > in sysctl.conf and my CPU is still slammed. SHould I up it to 10000?
> >
> >
> >
> >
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> >
> > Hello, list
> > I am helping Eric debug and test this situation as much as I can.
> >
> >
> > So to clarify and recap, here is the situation:
> >
> >
> >
> > This is a production setting, in a school, that has 200+ students
> > using a mix of systems,with the primary client being OSX 10.8.
> > and the primary function is using NFS.
> >
> I haven't touched a Mac in several years, but I think Finder probes at
> regular intervals to see if directories (oops, I meant folders;-) have
> changed. I think there is a way to increase the interval time between
> probes.
> Also, I think there are tunables for the metadata cache in ZFS, which
> might be useful for increasing the metadata cache sizes, since the probes
> will be checking metadata (attributes).
>
>
Can does anyone here on the list, have clues on where to start with ZFS
metadata turntables, and a command or two to profile the kernel for CPU
usage?

I'm willing to read up on kernel profiling as well, I'm just not sure where
to start


>

-- 

Sam Fourman Jr.