On Tue, Jun 15, 2010 at 03:31:42AM -0700, John Doe wrote:
> You could just use PNP and a custom script...
> http://docs.pnp4nagios.org/
PNP looks like a great project, when it matures. Someday it will be the
obvious answer, once someone writes a Nagios plugin that captures per-core
CPU load rather than just the generic system load, and the PNP crew enhances
their documentation with some working examples, or I learn German so I can
dive into the PNP forum (yes, they'll accept questions in English; but the
existing answers there mostly aren't.)
I'd probably need to write that Nagios plugin myself, since the standard use
for Nagios is spotting systems in danger, not checking how work distributes
over CPU cores for performance tuning. Looks like it would need to read data
from /proc/stat. Once fed into Nagios, PNP could get it into rrd, and from
there out to graphs. Or would it make better sense to feed the data directly
to rrd and skip the > Nagios > PNP handoffs?
For watching CPU cores in real time, a bunch of ssh sessions to htop gives
us a nice visual. The immediate question is how to get that the data graph
over time - one where a 16-core system isn't 16 separate graphs, but one
summary one. It does look like that's been solved for Cacti, if I can solve
my Cacti problem, and ignore its security problems.
Thanks,
Whit
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