title: How Intellij idea reduce memory after project was closed?
body: <p>I have opened several projects in Intellij Idea. A <a href="http://technet.microsoft.com/en-us/sysinternals/bb896653" rel="nofollow">process explorer</a> tool  indicates that idea64.exe    process uses ~2Gb as private Bytes and 3,5Gb as virtual size. When I closed several big sbt projects, but memory usage stayed the same. Is it a bug? Can I manually run somethink like "refresh" to free memory usage from closed projects?</p>