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snuids / grafana-radar-panel

A radar graph panel for Grafana
MIT License
24 stars 12 forks source link

Only fixed sizing for radar graphs available since 1.4.3 #11

Open hotstepper13 opened 5 years ago

hotstepper13 commented 5 years ago

Entry Criteria: My plan is to use radar style graphs for Infra Monitoring in terms of having specific values for multiple servers on one graph. This allows judging by observing the "shape" of the drawn figure. If the value from one server will raise, the "shape" is no longer "symmetric" allowing to see issues very fast.

Within the last release the option of defining min and max values for the graph were introduced.

After this you are forced to set a min and a max value for the graph and avoiding the automatic extension of the graph to the current max value.

Description: I have a radar graph that should show the current active thread count for four tomcat instances. All instances are currently around 160 Threads. Using the 1.4.2 provided by grafana plugin repository, the lower values cannot be seen as the graph is chosing to size from the min to the max (mean in the area between 156 to 162) which means the minimal values are located in the center.

With the new version from master (direct download) the graph is preconfigured with min=0 and max=0 which results a completely colored field as all values are above 0. By setting the max value to 200 everything looks as expected.

BUT, as our tomcats might use up to 1000 Threads there might be situations where the value is out of the scale.

Removing the value for max, inserting 0 for min and having a step of 0 render the are from -0.5 to 0.5. Adding a step of 10 breaks the whole view.

Expectation: Removing a value for min, max or step should default to "auto" like in other grafana graph´s

hotstepper13 commented 5 years ago

This a view with default settings in 1.4.3 (names are blurred afterwards because these are client systems) radar-default

And here is the configuration set to min=0 and max=200 (leaving step to 0) radar-0-200

snuids commented 5 years ago

Agreed, will try to have a look next week end.

hotstepper13 commented 5 years ago

Thank you. I have had already a look but i have no clue how this works in order to make a sufficient fix.

snuids commented 5 years ago

@hotstepper13

Done cheers,