- Right click on the project
- Select properties
- Adjust the VM Options
As a first approach I suggest increasing the Xmx option as I have done in the picture below.
If you need more fine grain memory tuning a good place is to start with Ken Sipe's blog entry:
Ken does a good job with his talks on JVM tuning. I have kept an old presentation of his from a NFJS a few years ago and often start there when I need to do some JVM tuning. A more in depth blog entry on the subject can be found on Pete Freitag's blog.