GlassFish: Can HttpSessions be pasivated when runinng low of memory?

Question

Hi,

Whenever we run a load test we run out of memory. We have realized that GlassFish doesn't serialize the http sessions to disk even if memory usage is 100%.

Is there a way for us to set a max idle timeout and min idle timeout for sessions like we do in tomcat. So if the container is running out of memory, it can start by serializing those sessions that have been idle for more than -let us say- 5 minutes?

Thanks in advance, Pablo.