Wrong min/max values

[schischi]

Hello,

I am trying to display minimum and maximum values of a temperature sensor.

But I am running into the following problem:
Lets say I select last 24 hours in the time range selector. The minimum temperature is 21 degree celcius. If I now select last 6 months in the time range selector I get 23 degree celcius as minimum value.

How is this possible? Shouldn’t be the minimum value in the 6 months range also 21 degree?

• What Grafana version and what operating system are you using?
  Grafana v9.5.21

• What are you trying to achieve?
  Displaying min and max values of a temperature sensor

[yosiasz]

what is your datasource @schischi , influx, mysql?

[ebabeshko]

@schischi

How is this possible?

Probably you are using an aggregation function that calculates average (i.e. mean) over a chosen period.

[schischi]

I set Max or Min.

[schischi]

It is a datasource from the monitoring software CheckMK.
Could this be the problem?

[ebabeshko]

What about your query? Any aggregation there?

[schischi]

I can’t change any query. The datasource looks like this:

Also no other result if I change the Max data points value.

[yosiasz]

Can you show us the Table View of your data without any aggregation applied?