One reason for the flat always-zero pop3 graph could be that it responds faster than Hobbit monitors. If the response time is less than 10 ms, then Hobbit will report it as zero - look at the pop3 status page and see the "Seconds: x.xx" which is the data that Hobbit uses for the graph.
As for the diamond-shaped graph - yes, this is quite puzzling. I've had a couple of other reports (see e.g. this thread: http://www.hobbitmon.com/hobbiton/2005/10/msg00332.html). We haven't been able to figure out why this happens, the data that goes into the RRD file look sane.
Regards, Henrik
On Fri, Jul 13, 2007 at 09:01:10AM +0200, Thomas Kaehn wrote:
Hi,
I've set up a hobbit server to monitor a couple of systems.
However the network test graphs from exactly one system are looking quite strange:
http://www.westend.com/pop3-1.png http://www.westend.com/pop3-2.png (zoomed in view)
According to this graph pop3 is answering always within zero seconds (I can't imagine this). And the response time of pop3s is alternating in such specific way that rrd draws triangles.
I've already deleted the rrd files, but the effect remains the same.
The system is running Debian 4.0 (librrd2 version 1.2.15-0.3). Has anybody seen such strange effects before? All other systems and even other services on the same system are looking reasonable.
Ciao, Thomas
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