On Thu, 25 Jul 2013 07:14:49 -0300 Bruno Galindro da Costa <bruno.galindro@gmail.com> wrote:

> NAV uses a simple tool called mcc.py (make cricket config) that is called
> by navcron's crontab (sudo -u navcron crontab -l | grep mcc) to make the
> config files used by cricket. I've experienced similar problems with
> cricket...

There are two delay factors one needs to be aware of when adding new
devices to NAV:

1. `mcc.py` is by default only run as a cron job once a day, at 5am. If
   you want immediate statistics collection, `mcc.py` must be run
   manually after adding devices.

2. Once a datasource is configured, Cricket needs to collect at least
   two values to produce a meaningful graph. With the default 5 minute
   collection interval, one cannot expect a graph to be rendered until
   10 minutes have passed.

--
Morten Brekkevold
UNINETT