[mrtg] MRTG "flat-line" after a while of service outage

[Amos Shapira]

Hello,

I've setup MRTG to graph the throuput of some internal software using an
external program and it worked well for a few weeks.

Yesterday we took down all the monitored services for a major database
overhaul and since then MRTG records the service's throughput as zero even
though the external program continue to show increasing counters of work
done.


For instance running the external program outputs:

5990344
5990344
0

And a few seconds later it will show:

5990414
5990414
0


Nothing has changed in the program or the MRTG configuration during that
time.

Here is the relevant part from that counter's config file:

Target[total]: `total-ti-counter /mnt/monitored/*/total.txt`
MaxBytes[total]: 50
Directory[total]: total
Title[total]: Total

MaxBytes is way more than the expected throughput (the throughput based on
the numbers above are 7.8 per second) but even setting it to 1000 instead of
50 doesn't help change the situation.

What could be wrong?

Thanks,

--Amos
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