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I’m trying to visualize computer performance data using Java Swing and JFreeChart.
On one chart I want to show CPU load (%) and user memory by some process. So, the possible values for CPU are 0..100, but for memory: from 10KB (10*1024b) to 500MB (500*1024*1024b), the difference is big.
What is the best way to present that data?
Thank you!
I’m assuming this will be a graph which is has time on the X axis and performance metric on the Y axis.
This being the case, I would display the memory as % of memory used instead of the number of (kilo|mega|giga)bytes in use. This way it could be overlaid on the CPU (and other performance metrics) without distorting the overall scale.
I no longer have a copy of the developer guide (this must be purchased from JFree.org) but as I recall, JFreeChart offers a way to add a tool-tip to points on a line graph. You could use this to provide the user a way to see the (kilo|mega|giga)bytes in use if they were interested in more than just the % of memory used.