Question: How to set empty ("") custom value for all in variable in Grafana

[bbkgh]

I want to create a variable that if i select all it replaces variable's value with empty string but when it's set to empty, it automatically adds all possible values to it.

My query is:
{service_name="$service_name", view="$view"}

I want to set view variable to empty when all is selected
{service_name="$service_name", view=""}

or is there any catch all value for pyroscope that i use as custom all value? (e.g: .* , all)

[bryanhuhta]

You should use a regex matcher (=~) on view.

{service_name="$service_name", view=~"$view"}

Then set your custom all value to .* to match everything.

Here's an example variable service where I set the custom all value:

I'm using this query:

{namespace="$namespace", service_name=~"$service"}

Here's the flame graph rendering in the dashboard: