sysctl -zarc for ZFS users

[Ranjan1018 .]

2014-12-08 5:34 GMT+01:00 Yoshihiro Ota <ota at j.email.ne.jp>:
>
> Thank you for your report, Maurizio.
>
> I missed 'svn add zarc.c' and resuled an incompelte patch.
> I uploaded a new one with a complete set to the bugzilla.
>
> Please try against clean directory, i.e. svn revert -R usr.bin/systat.
>
> Thanks,
> Hiro
>
>
> On Sat, 6 Dec 2014 15:28:05 +0100
> "Ranjan1018 ." <214748mv at gmail.com> wrote:
>
> > 2014-12-06 11:35 GMT+01:00 Yoshihiro Ota <ota at j.email.ne.jp>:
> >
> > > Hi all.
> > >
> > > I've been watching ZFS activites on my machine and
> > > improved systat to monitor such.
> > >
> > > One of my first goals is to watch ZFS cache statistics.
> > >
> > > I posted my patch to the bugzilla @
> > > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195460
> > > I've been using on 11-CURRENT and 10.1-RELEASE myself.
> > >
> > > Regards,
> > > Hiro
> > >
> > > % systat -zarc
> > >                        Total     MFU     MRU    Anon     Hdr   L2Hdr
> > >  Other
> > >      ZFS ARC            206M     63M    136M    826K   1102K      0K
> > >  5251K
> > >
> > >                                 rate    hits  misses   total hits total
> > > misses
> > >      arcstats                  : 75%    1183     388        23721
> > >  4202
> > >      arcstats.demand_data      :  0%       0       0          528
> > >   0
> > >      arcstats.demand_metadata  : 76%    1007     308        21441
> > >  2757
> > >      arcstats.prefetch_data    :  0%       0       0            0
> > >   0
> > >      arcstats.prefetch_metadata: 68%     176      80         1752
> > >  1445
> > >      zfetchstats               : 44%     954    1204        26410
> > > 25482
> > >      arcstats.l2               :  0%       0       0            0
> > >   0
> > >      vdev_cache_stats          :  0%       0       0            0
> > >   0
> > >
> >
> > Hi Hiro,
> >
> > just applied the patch, but I receive the error:
> >
> > # make
> > make: don't know how to make zarc.c. Stop
> > make: stopped in /usr/src/usr.bin/systat
> >
> > The file zarc,c is missing. Where can I find it ?
> >
> > Thanks.
> > Maurizio
> > _______________________________________________
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>

This patch is running on a 9.3-STABLE server for about a week with no
problems.
Only two cosmetics issues
- big numbers are difficult to read eg.

zfetchstats               : 99%     646       4    272407322    143761103

is more readable, for me, as

 zfetchstats               : 99%     646       4    272.41M    143.76M

- a total rate percent is missing.

Thank you for your work Hiro.
--
Maurizio.