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Docs: Added $__rate_interval to Prometheus help (#28030)

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* Docs: Added $__rate_interval to Prometheus help

The variable '$__rate_interval' was added in Grafana 7.2.0. This commit
adds the missing help information to Grafana's Prometheus PromQueryEditor.

Signed-off-by: David Calvert <davidcalvertfr@gmail.com>

* Docs: Fixed line length in PromQueryEditor.tsx

This commit will fix line length of my previous commit to make CI green
again.

Signed-off-by: David Calvert <davidcalvertfr@gmail.com>

* Docs: Fixed ci error

Fixed CI error due to my previous commits

Signed-off-by: David Calvert <davidcalvertfr@gmail.com>
(cherry picked from commit 1f389d72b2)
This commit is contained in:
David C
2020-10-08 12:00:32 +03:00
committed by Sofia Papagiannaki
parent a3398cafd6
commit 3147dadfdb
3 changed files with 8 additions and 3 deletions
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docs/sources/features/datasources/prometheus.md
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@@ -42,7 +42,7 @@ Open a graph in edit mode by clicking the title > Edit (or by pressing `e` key w
| ------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| _Query expression_ | Prometheus query expression, check out the [Prometheus documentation](http://prometheus.io/docs/querying/basics/). |
| _Legend format_ | Controls the name of the time series, using name or pattern. For example `{{hostname}}` is replaced with the label value for the label `hostname`. |
| _Min step_ | An additional lower limit for the [`step` parameter of Prometheus range queries](https://prometheus.io/docs/prometheus/latest/querying/api/#range-queries) and for the `$__interval` variable. The limit is absolute and not modified by the _Resolution_ setting. |
| _Min step_ | An additional lower limit for the [`step` parameter of Prometheus range queries](https://prometheus.io/docs/prometheus/latest/querying/api/#range-queries) and for the `$__interval` and `$__rate_interval` variables. The limit is absolute and not modified by the _Resolution_ setting. |
| _Resolution_ | `1/1` sets both the `$__interval` variable and the [`step` parameter of Prometheus range queries](https://prometheus.io/docs/prometheus/latest/querying/api/#range-queries) such that each pixel corresponds to one data point. For better performance, lower resolutions can be picked. `1/2` only retrieves a data point for every other pixel, and `1/10` retrieves one data point per 10 pixels. Note that both _Min time interval_ and _Min step_ limit the final value of `$__interval` and `step`. |
| _Metric lookup_ | Search for metric names in this input field. |
| _Format as_ | Switch between `Table`, `Time series` or `Heatmap`. `Table` will only work in the Table panel. `Heatmap` is suitable for displaying metrics of the Histogram type on a Heatmap panel. Under the hood, it converts cumulative histograms to regular ones and sorts series by the bucket bound. |