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Full summary implementation #18

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deadtrickster opened this issue Aug 15, 2016 · 1 comment
Open
2 tasks

Full summary implementation #18

deadtrickster opened this issue Aug 15, 2016 · 1 comment
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@deadtrickster
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backlog enhancement

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@deadtrickster
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deadtrickster commented Aug 15, 2016 •
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Now only basic variant of summary metric is implemented - with sum and count of observations.

What's left:

  • Quantiles;
  • Configurable sliding window

Prometheus summaries usually use highly biased quantile and since we deal with streaming data so they always implement the same algorithm from paper [0]. Example implementations: [1-3].

Sliding window seems to be implemented using N numbers of age-overlapped summaries maintained in parallel. Of course only 'top' one is rendered during scraping.

Due to the huge overhead maybe it's good idea to keep current simple implementation as an option?

References:
0. Effective Computation of Biased Quantiles over Data Streams

  1. Ruby Quantiles implementation
  2. Golang Quantiles implementation
  3. Common Lisp implementation
  4. Golang sliding window implementation
@deadtrickster deadtrickster added this to the Version 3.0 milestone Aug 15, 2016
@deadtrickster deadtrickster self-assigned this Aug 15, 2016
@deadtrickster deadtrickster modified the milestones: Version 4, Version 3 Aug 27, 2016
@deadtrickster deadtrickster removed this from the Version 4 milestone Mar 1, 2017
@RoadRunnr RoadRunnr mentioned this issue Dec 11, 2019
Merged
0xAX added a commit to 0xAX/eradius that referenced this issue Aug 5, 2020
@0xAX
replace exometer/exometer_core with prometheus.erl
cc2a45a 
TODO

  * no support for quantiles see - deadtrickster/prometheus.erl#18
it looks like exometer histograms should be replaced with
prometheus summary (but it needs to be discussed)
  * update documentation according to new metric format
0xAX added a commit to 0xAX/eradius that referenced this issue Aug 7, 2020
@0xAX
replace exometer/exometer_core with prometheus.erl
034d5d4 
TODO: there is no support for quantiles
(for more info see - deadtrickster/prometheus.erl#18)

It looks like exometer histograms should be replaced with prometheus summary
when it will have support for quantiles (but it needs to be discussed)
0xAX added a commit to 0xAX/eradius that referenced this issue Aug 9, 2020
@0xAX
replace exometer/exometer_core with prometheus.erl
6d7e45d 
TODO: there is no support for quantiles
(for more info see - deadtrickster/prometheus.erl#18)

It looks like exometer histograms should be replaced with prometheus summary
when it will have support for quantiles (but it needs to be discussed)
0xAX added a commit to 0xAX/eradius that referenced this issue Aug 10, 2020
@0xAX
replace exometer/exometer_core with prometheus.erl
8da8527 
TODO: there is no support for quantiles
(for more info see - deadtrickster/prometheus.erl#18)

It looks like exometer histograms should be replaced with prometheus summary
when it will have support for quantiles (but it needs to be discussed)
@hairyhum
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hairyhum commented Feb 3, 2021

So I found this: https://github.com/odo/quantile_estimator
It's rather old but seems to build, at least on OTP-21.
I'll take a look if it's possible to integrate to the summary metric.

@hairyhum hairyhum mentioned this issue Feb 5, 2021
Merged
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