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e9bcee30fa
Besides minor language corrections, this tries in particular to provide some clarity about the `step` setting in the Prometheus range query and the `$__interval` variable: - First of all: They are both always the same. - What's really confusing (and arguably really un-helpful) is that the _Min time interval_ is multiplied by the resolution factor. Therefore, I just state the fact here now but don't add anything like "This should be the scrape interval" because it is not true (if resolution is `1/10`, a meaningful _Min time interval_ is generally a tenth of the scrape interval). - More helpful is the _Min step_ parameter, because it is not multiplied by the resolution factor (which I have now stated explicitly). Of course, the _Min time interval_ has to be set to something small so that the _Min step_ parameter can kick in. It would be good if we could also override the _Min time interval_ tool tip because that is where most people will look, and the current, very Graphite-centric tool tip is very confusing for the Prometheus query editor, in particular because it doesn't have any hint about the resolution factor being applied. See #21413. Signed-off-by: beorn7 <beorn@grafana.com> |
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