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[gutmensch <question247784@xxxxxxxxxxxxxxxxxxxxx>]

New question #247784 on Graphite:
https://answers.launchpad.net/graphite/+question/247784

Hi,

I've been searching a lot and tried almost every graphite function available, but no help yet. 

I am sending metrics via collectd to graphite every minute and not using the "StoreRates" feature of collectd, so the values arrive as correct counter values.

For some metrics I do have very slowly incrementing counters 

---snippet from wsp file---
# whisper-dump.py /var/lib/carbon/whisper/mobile/collectd/rz46/dbmaster46-1/mysql/status/counter/slow_queries/value.wsp | head -n 50
Meta data:
  aggregation method: sum
  max retention: 34560000
  xFilesFactor: 0

Archive 0 info:
  offset: 52
  seconds per point: 60
  points: 10080
  retention: 604800
  size: 120960

...

Archive 0 data:
0: 1398553560,       1822
1: 1398553620,       1823
2: 1398553680,       1823
3: 1398553740,       1823
4: 1398553800,       1823
5: 1398553860,       1823
6: 1398553920,       1823
7: 1398553980,       1823
8: 1398554040,       1823
9: 1398554100,       1823
10: 1398554160,       1823
11: 1398554220,       1824
12: 1398554280,       1824
13: 1398554340,       1824
14: 1398554400,       1824
15: 1398554460,       1824
16: 1398554520,       1824
17: 1398554580,       1824
18: 1398554640,       1824
19: 1398554700,       1824
20: 1398554760,       1824
21: 1398554820,       1825
22: 1398554880,       1825
--- end of snippet ---

When displaying the counter this results in some kind of a step function, which breaks the typical "nonNegativeDerivative" approach for getting a rate out of this counter, because the function is not continuous on every re-occuring value and so I only get useless spikes as rates. Is there any way to overcome this problem like "ignore/remove all repeated values and then derive"?

Thanks for your help and sorry if I missed some simple solution.

Cheers
Robert

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