A DESCRIPTION OF THE PROBLEM :
with JDK-1.8.0.162 we are running a java application with 75Gb Xmx on 96Gb Node.
were we observed the spike in memory growth outside the heap, so enabled NMT and tracked the usage.
From the stats fount that
- Internal (reserved=5692871KB, committed=5692839KB)
                            (malloc=5692839KB, #684787)
                            (mmap: reserved=32KB, committed=0KB)

mem usage under Internal is causing the spike so added a parameter called -XX:MaxDirectMemorySize=2g
after enabling this property the growth is reduced but not solved means, the internal mem usage is more than 2g.


FREQUENCY : always