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docs/keyConcepts.md: use 1. instead of N. in numbered bullets, so they are automatically adjusted by Github Markdown engine

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@ -213,11 +213,9 @@ This query works in the following way:
1. The `increase(vm_rows_read_per_query_bucket[1h])` calculates per-bucket per-instance 1. The `increase(vm_rows_read_per_query_bucket[1h])` calculates per-bucket per-instance
number of events over the last hour. number of events over the last hour.
1. The `sum(...) by (vmrange)` calculates per-bucket events by summing per-instance buckets
2. The `sum(...) by (vmrange)` calculates per-bucket events by summing per-instance buckets
with the same `vmrange` values. with the same `vmrange` values.
1. The `histogram_quantile(0.99, ...)` calculates 99th percentile over `vmrange` buckets returned at step 2.
3. The `histogram_quantile(0.99, ...)` calculates 99th percentile over `vmrange` buckets returned at step 2.
Histogram metric type exposes two additional counters ending with `_sum` and `_count` suffixes: Histogram metric type exposes two additional counters ending with `_sum` and `_count` suffixes:
@ -271,16 +269,16 @@ implementations of a histogram supported by VictoriaMetrics:
supported by most of supported by most of
the [client libraries for metrics instrumentation](https://prometheus.io/docs/instrumenting/clientlibs/). Prometheus the [client libraries for metrics instrumentation](https://prometheus.io/docs/instrumenting/clientlibs/). Prometheus
histogram requires a user to define ranges (`buckets`) statically. histogram requires a user to define ranges (`buckets`) statically.
2. [VictoriaMetrics histogram](https://valyala.medium.com/improving-histogram-usability-for-prometheus-and-grafana-bc7e5df0e350) 1. [VictoriaMetrics histogram](https://valyala.medium.com/improving-histogram-usability-for-prometheus-and-grafana-bc7e5df0e350)
supported by [VictoriaMetrics/metrics](https://github.com/VictoriaMetrics/metrics) instrumentation library. supported by [VictoriaMetrics/metrics](https://github.com/VictoriaMetrics/metrics) instrumentation library.
Victoriametrics histogram automatically handles bucket boundaries, so users don't need to think about them. Victoriametrics histogram automatically handles bucket boundaries, so users don't need to think about them.
We recommend reading the following articles before you start using histograms: We recommend reading the following articles before you start using histograms:
1. [Prometheus histogram](https://prometheus.io/docs/concepts/metric_types/#histogram) 1. [Prometheus histogram](https://prometheus.io/docs/concepts/metric_types/#histogram)
2. [Histograms and summaries](https://prometheus.io/docs/practices/histograms/) 1. [Histograms and summaries](https://prometheus.io/docs/practices/histograms/)
3. [How does a Prometheus Histogram work?](https://www.robustperception.io/how-does-a-prometheus-histogram-work) 1. [How does a Prometheus Histogram work?](https://www.robustperception.io/how-does-a-prometheus-histogram-work)
4. [Improving histogram usability for Prometheus and Grafana](https://valyala.medium.com/improving-histogram-usability-for-prometheus-and-grafana-bc7e5df0e350) 1. [Improving histogram usability for Prometheus and Grafana](https://valyala.medium.com/improving-histogram-usability-for-prometheus-and-grafana-bc7e5df0e350)
#### Summary #### Summary