I'm looking at my Metricbeat Docker dashboard in Kibana (I believe I'm using v5.4?); the Docker CPU usage graph tells me that the Y axis is displaying "75th percentile of Total CPU time", where the units appear to be steps of .1. It's really unclear to me what this means, since the processes I'm using take more than fractions of a second in the CPU.
I went to the Visualize section for the graph to look at how this graph is put together, and it says that the Y axis is "Percentiles of docker.cpu.total.pct"; so somehow this is looking at the 75th percentile of CPU times taken up by processes at any given time. Now I'm really confused; does this mean that these fractions indicate a percentage? So if something peaks at .5, that means that it's taking 50% of the CPU? If so, how does the percentile come into the picture?
I could use a little guidance for parsing this. Thanks!