title: jstat -gcmetatcapacity output MCMX values seems to be irrelevant
body: <p>I am running a <code>jvm (java 8)</code> with parameters "<code>-XX:MetaspaceSize=256M and -XX:MaxMetaspaceSize=256M</code>". When I execute "<code>jstat -gcmetacapacity &lt;PID&gt;</code>", it outputs,</p>
  
  <pre><code>  MCMN       MCMX        MC       CCSMN      CCSMX       CCSC     YGC   FGC    FGCT     GCT   
         0.0  1157120.0   122880.0        0.0  1048576.0    14336.0   499     5    1.131   12.653
  </code></pre>
  
  <p>I would expect both <code>MCMN</code> and <code>MCMX</code> to be <code>256M</code>. </p>
  
  <p>This looks similar to bug <a href="http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8077987" rel="noreferrer">http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8077987</a>. But it has been closed with documentation fix for MC.  I am hoping it is jstat bug and java configuration is correct. Is there another way to confirm this? </p>
  
  <p>Java version</p>
  
  <pre><code>java version "1.8.0_92"
  Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
  Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)
  </code></pre>