title: Java Could not reserve enough space for object heap error
body: <p>I have Java7 running on 32-bit Windows and 4 GB RAM, but:</p>
  
  <pre><code>java -Xmx4G -Xms4G -jar Minecraft.jar 
  java -Xmx3G -Xms3G -jar Minecraft.jar 
  java -Xmx2G -Xms2G -jar Minecraft.jar
  </code></pre>
  
  <p>...still does not work. Error:</p>
  
  <blockquote>
    <p>Error occurred during initialization of VM<br>
        Could not reserve enough space for object heap<br>
        Error: Could not create the Java Virtual Machine.<br>
        Error: A fatal exception has occurred. Program will exit.  </p>
  </blockquote>
  
  <p><code>java -Xmx1G -Xms1G -jar Minecraft.jar</code> is working. Why?</p>