Since we started using EE2 we have built almost every site as a fresh build. However the first time we did it we actually did an upgrade and we did not realize we needed to remove the old addons, etc beforehand. It was very difficult to get the site to work because of that but we eventually managed to fix it, or so we thought. However, after we launched it we started having memory leakage problems from that particular site only. Our other EE2 sites are fine but even after removing almost every php script that could be causing issue we still use 5 or 6 times as much memory per connection on this site. After much research and testing our team at Rackspace and I both feel there is a problem with the upgrade of the actual site. I need to know if this is possible or if there is something we can do to fix it? Have you heard of any issue like this before. We aren’t running anything more than we were running on EE1 at this point and we still have massive memory usage. To keep our servers up we have load balanced them and doubled the memory but there is still something just not quite right. I really need some help in understanding where the process may have gone wrong. When we looked at our DB we had tables from both ee1 and ee2 so we removed the ee1 tables but nothing seems to matter. Do you have any idea what might be going on with this?