Traffic has little to do with it, it's more the amount of memory PHP takes up generating the lists of stuff. I find it hard to believe it's more than 1GB though. Further investigation has shown memory is generally fine for this. Dan, can I ask the devs to take a look because this has to be a code issue. I understand if you're busy with integration for 2.4, feel free to pass this on to someone else if need be, I'll give full access to the required logs and servers as needed.