ARC & L2ARC efficiency

[Alex Trull]

I went straight for munin since I like to track these stats long term
along with everything else going on - there are some older scripts I put
on muninexchange but since zfs13 came to 7. I split and updated them to
handle the newer counters including l2arc:

scripts zfs-* :
http://trull.org/~alex/src/FreeBSD/muninplugins/

example graphs (forgive the amazingly redundant path) :
http://web.internationalconspiracy.org/munin/internationalconspiracy.org/potjie.internationalconspiracy.org.html#Filesystem

If you want to see more short term performance stats with a while
running a filesystem benchmark test (or just under normal load) I
recommend 'zpool iostat -v poolname N' where poolname is obvious and N
is the number of seconds for refresh. This not only shows IO read and
write but also the throughput per disk, including the l2arc cache.

--
Alex

On Thu, 2009-10-01 at 16:20 -0700, Artem Belevich wrote:
> Here's another script:
> http://www.solarisinternals.com/wiki/index.php/Arcstat
> 
> Attached hacked FreeBSD version.
> 
> --Artem
> 
> 
> 
> On Thu, Oct 1, 2009 at 4:00 PM, Artem Belevich <fbsdlist at src.cx> wrote:
> > There's a pretty useful script to present ARC stats (alas, L2ARC info
> > is not included) in a readable way:
> > http://cuddletech.com/arc_summary/
> >
> > I've attaches somewhat hacked (and a bit outdated) version that runs on FreeBSD.
> >
> > --Artem
> >
> >
> >
> > On Thu, Oct 1, 2009 at 1:22 PM, Alexander Shevchenko <pepelac at gmail.com> wrote:
> >> Good time of day!
> >>
> >> How could i check the efficiency of ARC?
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