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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>
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David C 2020-10-05 16:14:33 +01:00 committed by GitHub
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commit 1f389d72b2
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3 changed files with 8 additions and 3 deletions
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2
docs/sources/features/datasources/prometheus.md
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@ -46,7 +46,7 @@ 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. |

3
public/app/plugins/datasource/prometheus/components/PromQueryEditor.tsx
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@ -136,7 +136,8 @@ export class PromQueryEditor extends PureComponent<Props, State> {
tooltip={
<>
An additional lower limit for the step parameter of the Prometheus query and for the{' '}
<code>$__interval</code> variable. The limit is absolute and not modified by the "Resolution" setting.
<code>$__interval</code> and <code>$__rate_interval</code> variables. The limit is absolute and not
modified by the "Resolution" setting.
</>
}
>

6
public/app/plugins/datasource/prometheus/components/__snapshots__/PromQueryEditor.test.tsx.snap
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@ -52,7 +52,11 @@ exports[`Render PromQueryEditor with basic options should render 1`] = `
<code>
$__interval
</code>
variable. The limit is absolute and not modified by the "Resolution" setting.
and
<code>
$__rate_interval
</code>
variables. The limit is absolute and not modified by the "Resolution" setting.
</React.Fragment>
}
width={7}