On Thu, 2017-10-19 at 08:56 -0700, Nawab Zada Asad Iqbal wrote: > I see three colors in the JVM usage bar. Dark Gray, light Gray, > white. (left to right). Only one dark and one light color made sense > to me (as i could interpret them as used vs available memory), but > there is light gray between dark gray and white parts.
The light grey is the amount of memory reserved by the JVM. It is only visible if you do not specify Xms, so many people do not have that. Generally the dark grey (the amount of heap that is actively used to hold data) will fluctuate a lot and I don't find it very usable for observing and tweaking heap size. The GC-log is better. - Toke Eskildsen, Royal Danish Library
