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Histogram bucket value is greater than count #176

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rybbchao opened this issue Oct 5, 2020 · 0 comments
Open

Histogram bucket value is greater than count #176

rybbchao opened this issue Oct 5, 2020 · 0 comments

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@rybbchao
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rybbchao commented Oct 5, 2020

I use fluentd to collect logs and export histogram metrics. Some values in buckets were greater than count.

image
image

  Bucket Count
2020-09-25 03:21:03 544688 544703
2020-09-25 03:21:04 547495 548359
2020-09-25 03:21:33 547495 548359
2020-09-25 03:21:34 549010 549025

From 03:21:33 to 03:21:34, the increments are as below:

  • Bucket: 549010 - 547495 = 1515
  • Count: 549025 - 548359 = 666

I tried to reproduce it but I failed. However, it happened several times.

Do you have any idea about this?

Environment

  • Prometheus version: v2.21.0
  • Fluentd version: v1.11.2
  • fluent-plugin-prometheus: v1.8.4 (prometheus/client_ruby: v0.9.0)
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