Question on Memory utilization and Siebel Sessions

Hi

We are in performance test phase and there are few observations from the test results which we are not able to explain.

We are using 660 Load runner  vUsers which we ramp up for 1 hour, then run for steady state for 6 hours and ramp down in 1 hour

1. Vusers vs Connections

What we could observe from the results is though the v-users are ramped down to zero Siebel connections are still persisting

2. CPU vs Memory

Another observation is though our CPU utilization comes down post the test execution ends memory still seem to be highly utilized. We have already checked the memory leak report using our automated code review tool and their is no un-nullified variables in e-Script