[OmniOS-discuss] strange io-pattern

[Tobias Oetiker]

Today Richard Elling wrote:

> On Dec 13, 2013, at 5:13 AM, Tobias Oetiker <tobi at oetiker.ch> wrote:
>
> > Hi Paul,
> >
> > Today Paul Jochum wrote:
> >
> >> Hi Tobias:
> >>
> >>     Sorry, I don't know why you are having these strang io-patterns, but I was wondering if you could share how you
> >> record and display this info?
> >
> > I created a little plugin for collectd to interface with iostat. I
> > guess having one for vfsstat and arcstat along the same lines would
> > give a better picture as to what users actually experience but this
> > one gives some impression as to what happens deep down.
>
> Your script seems to break this out per-device, but that isn?t clear from
> the graphs you posted. This pattern is consistent with a misbehaving device.

the charts just show the stats for one zpool (a raidz2) standard
illumos style ... so it can not realy be 'a device'

also zfs and smart did not record any irregularities

cheers
tobi


-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900