title: Understanding metaspace size
body: <p>JVM Settings:</p>
  
  <pre><code>-Xms8192M
  -Xmx8192M
  -XX:NewRatio=1
  -XX:SurvivorRatio=6
  -XX:MetaspaceSize=256M
  -XX:MaxMetaspaceSize=512M
  </code></pre>
  
  <p>Output of jstat is </p>
  
  <pre><code>S0C    S1C    S0U    S1U      EC       EU        OC         OU       MC     MU    CCSC   CCSU   YGC     YGCT    FGC    FGCT     GCT   
  524288.0 524288.0  0.0   231108.3 3145728.0 2926008.3 4194304.0   73553.2   58624.0 56981.2 8960.0 8619.0      5    0.684   1      0.235    0.919
  </code></pre>
  
  <p>output of gccapacity is</p>
  
  <pre><code>NGCMN    NGCMX     NGC     S0C   S1C       EC      OGCMN      OGCMX       OGC         OC       MCMN     MCMX      MC     CCSMN    CCSMX     CCSC    YGC    FGC 
  4194304.0 4194304.0 4194304.0 218624.0 208896.0 3766784.0  4194304.0  4194304.0  4194304.0  4194304.0      0.0 1099776.0  59136.0      0.0 1048576.0   8960.0     26     1
  </code></pre>
  
  <p>In both the above output size of metaspace is  around 56M even though minimum metaspaceSize is defined as 256m</p>