The graph showed a reduction at various points. Is there a bug in the recording 
rule calculation that can cause reduction which needs fixing? 

On 27 February 2020 06:24:11 GMT, Venkata Bhagavatula <[email protected]> 
wrote:
>Hi ,
>Thanks for the response. When we a recording rule, what will be the
>metric
>type of this derived counter?. In the increase function documentation
>it
>was mentioned that
>increase(v range-vector) calculates the increase in the time series in
>the
>range vector. Breaks in monotonicity (such as counter resets due to
>target
>restarts) are automatically adjusted for.
>
>Also why it worked on the original metric as on both dervied and
>original
>metric has reduction?
>
>Thanks n Regards,
>Chalapathi
>
>
>On Wed, Feb 26, 2020 at 10:49 PM Stuart Clark
><[email protected]>
>wrote:
>
>> Counters must only increase. Any reduction is seen as a counter
>reset.
>>
>> If this isn't a counter use the derivative function rather than rate
>>
>> On 26 February 2020 14:05:31 GMT, Venkata Bhagavatula <
>> [email protected]> wrote:
>>>
>>> Hi,
>>>
>>> In our application, there is one metric that we are deriving from
>another
>>> metric using recording rules.
>>> When we plot the graphs of recording metric and the original metric
>in
>>> grafana, we see the graph to follow the same trend. But when we
>applied
>>> increase , then we have seen recording metric is having huge spikes,
>>> whereas original metric is not having these spikes.
>>>
>>> following is the plotted graph:
>>> [image: image.png]
>>> The bottom panels show the increase of both these  metrics over
>time. As
>>> you can see, there are points where the metric values goes down.
>Prometheus
>>> handles these as resets for metric type “Counter”, and the increase
>>> function handles it gracefully.
>>>
>>> Can you let us know how these recording metrics are treated in
>>> prometheus? and any pointers on how to debug this issue.
>>>
>>> Thanks n Regards,
>>> Chalapathi.
>>>
>>>
>> --
>> Sent from my Android device with K-9 Mail. Please excuse my brevity.
>>
>
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