title: Failed on starting Spring Tool Suite when I change XMx
body: <p>I am trying to change and increase the default -Xmx768m to -Xmx1024 in STS.ini. However, on startup I get an error saying "Failed to create the JVM". </p>
  
  <p>If I revert it back to 768 it works fine. Any idea as to what am I doing wrong and how can I improve the performance of STS?</p>
  
  <p>Here is the configuration</p>
  
  <pre><code>-startup
  plugins/org.eclipse.equinox.launcher_1.1.1.R36x_v20101122_1400.jar
  
  --launcher.library
  plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.2.R36x_v20101222
  
  -product
  com.springsource.sts.ide
  
  --launcher.defaultAction
  openFile
  
  --launcher.XXMaxPermSize
  256M
  
  -vmargs
  -Dosgi.requiredJavaVersion=1.5
  -Xms256m
  -Xmx768m
  -XX:MaxPermSize=256m
  </code></pre>