A lower limit for the auto group by time interval. Recommended to be set to write frequency,
for example 1m if your data is written every minute. Access auto interval via variable $__interval for time range
string and $__interval_ms for numeric variable that can be used in math expressions.
If your time series store has a query cache this option can override the default
cache timeout. Specify a numeric value in seconds.
The maximum data points the query should return. For graphs this
is automatically set to one data point per pixel.