Hi, Iris, The Flink counter is cumulative. There are `inc` and `dec` methods in it. As the value of the counter has been calculated in Flink, we do not need use the counter metric in statsd to calculate.
Best, Hang Iris Grace Endozo <iris.end...@gmail.com> 于2023年5月10日周三 14:53写道： > Hey Hang, > > Thanks for the prompt response. Does this mean the Flink counters emitted > via statsd are cumulative then? From the spec > https://github.com/b/statsd_spec#counters > > > > A counter is a gauge calculated at the server. Metrics sent by the > client increment or decrement the value of the gauge rather than giving its > current value. > > This means that counters are not monotonic and work like deltas that are > aggregated on the server side. > > Cheers, Iris. > > -- > > *Iris Grace Endozo,* Senior Software Engineer > *M *+61 435 108 697 > *E* iris.end...@gmail.com > On 10 May 2023 at 1:02 PM +1000, Hang Ruan <ruanhang1...@gmail.com>, > wrote: > > Hi, Iris, > > The metrics have already be calculated in Flink. So we only need to > report these metric as the gauges. > For example, the metric `metricA` is a Flink counter and is increased from > 1 to 2. The statsd gauge will be 2 now. If we register it as a statsd > counter, we will send 1 and 2 to the statsd counter. The statsd counter > will be 3, which is a wrong result. > > Best, > Hang > > Iris Grace Endozo <iris.end...@gmail.com> 于2023年5月9日周二 19:19写道： > >> Hey folks trying to troubleshoot why counter metrics are appearing as >> gauges on my end. Is it expected that the StatsdMetricsReporter is >> reporting gauges for counters as well? >> >> Looking at this one: >> https://github.com/apache/flink/blob/master/flink-metrics/flink-metrics-statsd/src/main/java/org/apache/flink/metrics/statsd/StatsDReporter.java#L207: >> the statsd specifications state that counters need to be reported as >> <metric name>:<value>|c[|@<sample rate>] but it seems it's defaulting to >> "%s:%s|g" in the above. Ref: https://github.com/b/statsd_spec#counters >> >> Wondering if anyone else has hit this issue or there's an existing issue? >> >> Cheers, Iris. >> >> -- >> >> *Iris Grace Endozo,* Senior Software Engineer >> *M *+61 435 108 697 >> *E* iris.end...@gmail.com >> >
