Unexpected spikes

Hi all, me again.

I have an influxDB temperature source:

without spikes.

When I enable query A and/or B and/or C then the temperature graph shows spikes:

What could cause this?

Thanks for any help!

Can anyone offer any help? Thanks!

Looks quite odd - and possibly a bug. I guess the value of the line chart is “stacked” along with the bar charts, even though it’s (I assume) on a separate y-axis? Maybe try adding an override to the line chart to explicitly disable stacking, and see if that helps?

Otherwise check the Grafana GitHub Issues list. I feel like I’ve seen behavior like this reported there before (and maybe already fixed in more recent versions)