I just ran a load test. In the IDE, the average % time in GC was reported as 43.5 (min 41, max 53.2). This was on the web server.

This went on for about 10 minutes.

Here is a copy/paste from the table beside the graph in the IDE:
% Time in GC
00:10 41.0
...
09:00 41.2

Finally, I opened System Monitor on the web server and found the actual values were 40% lower (and therefore in the expected range with a true average of about 2%).

I just wanted to provide an FYI that I saw this happen. I'm not sure if I can reproduce it (and it is too late to try tonight).

Regards,
Mountain