Is this recycle of soft reference?

In this picture, there is a steep drop in JVM Heap graph between 8 a.m. to 9 a.m.. I am wondering the reason of this.

My log entered smoothly at that time (8 a.m to 9 a.m).

What is that? Is recycle of soft reference in Java?
This is important cause I am investigating how much heap size is suitable for my service.

Version of Elastic stack is 6.3.1, and my server os is
Linux 581dd302fe61 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.