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Feature-request: Auto-adjust span if too small #49

Closed sbktrifork closed 5 years ago

sbktrifork commented 5 years ago

If you have a dashboard showing grafs for a short time range (example "last 1h") and hard-coded span time (example 5 sec), you currently can't use the dashboard filter to extend the time range for all grafs to for example 24h - all grafs will show the ASCII-art owl, because the span is too small.

Proposal for a fix: Auto-adjust the span and show the grafs instead of showing the ACSCII-art owl. Perhaps a little warning pop-up to inform the user that the span has been increased.

pmech commented 5 years ago

hi @sbktrifork. The timechart() function has a bucket parameter where you set how many buckets you want in you chart. This parameter is zoom neutral. Will this solve you problem?

sbktrifork commented 5 years ago

hi @pmech - that's nice to know, thanks - I will adjust all our dashboards....

But I still think that auto-adjusting span if buckets would result in >1500 would be a nice feature. It just doesn't seem user-friendly to end up in a error like this: "using a span of 50s results in 1728 buckets. Maximum is 1500" When humio as well just could show the graf with buckets=1500 instead with a little note about the span is too small. On the other hand there might be other use-cases (which I'm not aware of) where it makes sense to show the error message instead of returning best-effort-results... ?

mortengrouleff commented 5 years ago

Implemented. When too many buckets would result from the span, the span is widened to fit the max of 1500 buckets, and than a warning is added. This helps when applying a "global timespan" on a dashboard of widgets with different spans in their charts.