I wanted to configure a common graph for several DCI values with the same instance (they have same Instance Discovery script).
I used {instance-name} in the Title and Group fields, but it didn't work. All instances were displayed in one graph and the displayed Title of the graph contained the text {instance-name} instead of its value.
Then I tried to use {instance} in the Title and Group fields and everything works as I need. Even the title of the chart contains the name of the instance, so the contents of {instance-name}, even though I have {instance} used in the Title configuration.
it seems confusing to me and is probably not an intention.
I'm glad you posted this. Helped me figure out why I couldn't get my performance tab working the way I wanted. I guess it must be this way for historical reasons or something, but it wasn't what I expected based on what was working in other parts of my DCI configuration.
Yes, it's so for some historical reasons. Will stay so in 3.x versions, but hopefully will be reworked in 4.0