title: Java JVM Default Garbage Collector: is it configured the same across different applications?
body: <p>Simply as specified in the title.</p>
  
  <p>I ran a test and recorded its memory heap usage pattern over time using JMX. Then I reran my jar file later and studied its memory behavior again. The result was a slightly different memory pattern. In both cases I didn't preconfigure my garbage collector. So I want to know now if two default garbage collectors have the same configurations on the same machine.</p>
  
  <p>If not, how can I ensure that my garbage collector is the same without specifying many parameters? Also what could contribute to my result if not the GC config?</p>