prometheus data format

[nzomkxia]

No description provided.

[codecov-io]

Codecov Report

Merging #43 into master will decrease coverage by 0.05%.
The diff coverage is 63.07%.

@@             Coverage Diff              @@
##             master      #43      +/-   ##
============================================
- Coverage     33.87%   33.81%   -0.06%     
+ Complexity     1290     1288       -2     
============================================
  Files           213      213              
  Lines         13685    13717      +32     
  Branches       1094     1101       +7     
============================================
+ Hits           4636     4639       +3     
- Misses         8745     8767      +22     
- Partials        304      311       +7

Impacted Files	Coverage Δ	Complexity Δ
...java/com/alibaba/metrics/server/MetricsOnDisk.java	8.33% <ø> (+0.64%)	2 <0> (ø)	⬇️
...trics/reporter/file/FileMetricManagerReporter.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...n/java/com/alibaba/metrics/MetricRegistryImpl.java	72.83% <0%> (-0.56%)	86 <0> (ø)
...rics/reporter/bin/StructMetricManagerReporter.java	65.07% <44.44%> (-4.16%)	14 <1> (ø)
...a/com/alibaba/metrics/jvm/BufferPoolMetricSet.java	86.36% <66.66%> (-8.64%)	5 <1> (ø)
...com/alibaba/metrics/os/linux/CpuUsageGaugeSet.java	79.66% <84.61%> (-0.71%)	28 <1> (+1)
...in/java/com/alibaba/metrics/BucketCounterImpl.java	86.79% <0%> (-3.78%)	19% <0%> (-1%)
...l/src/main/java/com/alibaba/metrics/Striped64.java	57.4% <0%> (-3.71%)	9% <0%> (-2%)
...ibaba/metrics/reporter/bin/ChannelFileBackend.java	78.57% <0%> (-2.86%)	12% <0%> (ø)

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[ralf0131]

There is one more bucket called +Infinity. see the test output for Prometheus Histogram.

# HELP test_prom_histogram test histogram
# TYPE test_prom_histogram histogram
test_prom_histogram_bucket{le="10.0",} 20.0
test_prom_histogram_bucket{le="100.0",} 172.0
test_prom_histogram_bucket{le="500.0",} 830.0
test_prom_histogram_bucket{le="1000.0",} 1615.0
test_prom_histogram_bucket{le="+Inf",} 1615.0

Note that in Prometheus the value is accumulated for each bucket, however in Alibaba metrics, the value is not. It may be necessary to adapt to prometheus logic.