histogram: get sample count after distinguishing classic and native #176
Conversation
`GetSampleCount` returns 0 for float histograms. Signed-off-by: Jan Fajerski <[email protected]>
There was a problem hiding this comment.
Good catch.
However, even classic histograms can be float histograms (which is a relatively new addition to the protobuf spec, so prom2json wasn't aware of this so far).
See my comment how to fix count, but we also have to fix makeBuckets and let it try GetCumulativeCountFloat first.
| @@ -112,7 +112,6 @@ func makeHistogram(m *dto.Metric) Histogram { | |||
| hist := Histogram{ | |||
| Labels: makeLabels(m), | |||
| TimestampMs: makeTimestamp(m), | |||
| Count: fmt.Sprint(dtoH.GetSampleCount()), | |||
There was a problem hiding this comment.
Even classic histograms can be float histograms, so we need to treat this differently for both classic and native histograms.
So what we have to do is to first check dtoH.GetSampleCountFloat(). If that's > 0, take it. Otherwise, take dtoH.GetSampleCount().
There was a problem hiding this comment.
ahh I didn't know that. I guess we need the same in pushgateway too :)
There was a problem hiding this comment.
Yeah, although I think it will never really happen that somebody pushes a classic float histogram to the PGW. But yes, in principle, we want that in the PGW, too.
Signed-off-by: Jan Fajerski <[email protected]>
GetSampleCountreturns 0 for float histograms.