That e-6 is the scientific notation so even smaller…
Yes it is the cumulative CPU used since starting the app.
Restating one app wil show that graph only for that app…
As 5e-6 is 0.00005 it is rounded to 0.00%
What you show is nothing to worry about.
Maybe look at the system load.
Ps also great post High system load > 100% - #25 by Rrrr
And Insights scales
