How To Increase Java Applet Memory

 

The amount of memory available to Java applets is configurable. The default setting is likely to be around 60-90 MB. Follow the instructions below to increase this limit.

 

On a Windows PC

 

  • Click on 'Start'
  • Click on 'Control Panel'
  • Double click on the 'Java Plug-in' icon (which may be under 'Other Control Panel Options')
  • Select the 'Java' tab and click on the 'View...' button, under the 'Java Applet Runtime Settings' section
  • Find the most recent 'Version' Java runtime line
  • Double click on the 'Java Runtime Parameters' box and add "-Xmx500m" to increase the memory to 500 MB
  • Click 'OK' to exit all dialogs. Close the control panel window
  • Restart your web browser
  • Revisit the page that required increased Java applet memory, e.g. this Jmolvisualization of a very large biological assembly

 

On a Mac (using Safari)

 

  • Open the "Java Preferences" application, found under "Applications" >> "Utilities" (or by searching for "Java Preferences" in Spotlight)
  • Select the "General" tab
  • Under "Java Applet Plugin", select the top entry (e.g. "J2SE 5.0" or "Java SE 6")
  • Click on "Options"
  • Type "-Xmx500m" into the text box to increase the memory to 500 MB
  • Click "OK"
  • You may now close the "Java Preferences" application as well
  • Restart Safari
  • Revisit the page that required increased Java applet memory, e.g. this Jmolvisualization of a very large biological assembly