Increase Java heap size for Tomcat, Jboss Application Server

 How-to, Java, Java Tips  No Responses »
Jul 142011
 

If your Java application runs out of memory (Tomcat, jBoss, Eclipse…), the following error occurs:

Exception in thread “main” java.lang.OutOfMemoryError: Java heap space

This can have two reasons:

  • Your Java application has a memory leak. There are tools like YourKit Java Profiler that help you to identify such leaks.
  • Your Java application really needs a lot of memory (more than 128 MB by default!). In this case the Java heap size can be increased using the following runtime parameters:

java -Xms -Xmx

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