title: JVM metaspace is filled after minor garbage collection
body: <p>I have been looking into Java memory management and various sections in the heap memory like eden, s0, s1, old gen and metaspace. I was using VisualGC for tracking how memory is filled among different sections of heap. I noticed there is a sharp increase in the amount of memory occupied in the metaspace area after first garbage collection. </p>
  
  <p>Here's an image of the VisualGC representation:</p>
  
  <p><img src="https://i.stack.imgur.com/8Tn9N.png" alt="VisualGC_Monitoring"></p>
  
  <p>I would like to understand what gets added to metaspace after the first gc. I did research but couldn't get answers. Any help here?</p>