Re: [munin-users] Adjust munin refresh time

[Steve S. <ste...@gm...>]

On Wed, Apr 6, 2011 at 17:56, Thomas Baumann <bt0...@gm...> wrote:
> >From reading the mailing list and some howtos, that this feature is
> planned but not complete available yet in munin 2.0.

First, sorry about the delay.

But, yup, that's the idea (to have it in 2.0)

> RRDs::create ("$fname", "-s 60",

Ouch, you have a *very* valid point. I completely forgot to address
the RRD "step" in my commits about a flexible update_rate. That's has
some nasty consequences, the most important is an eventual resolution
loss. And I'm very sensitive to data loss, specially when it happens
silently.

> The cronjob was changed to 1 minute as well:
>
> */1 * * * *     munin test -x /usr/bin/munin-cron && /usr/bin/munin-cron
>
> I tried to change the munin-graph as well, but I end up with graphs
> showing nothing or some gaps.

In 1.4, you can try to externalize munin-update from munin-cron. It
might help to avoid missed data collections, since the whole update +
graph + html + limits could take more than 1 min.

Having munin-graph/html/limits running every 5 min is not that bad,
since you'll still have a 1 min precision in the RRD.

> Could somebody tell me, if this is the right way to do it. As
> reference the changed munin-graph as well.

You did the right thing. But the main prob is that 300 (5min) is hard
coded a lot all throughout the code. I noticed that when trying, for
2.0, to have a parametric --step as you rightfully implied.

--
Steve Schnepp
http://blog.pwkf.org/