Maybe this is the reason? (solution inside) https://www.reddit.com/r/Ubuntu/comments/4v3ft4/why_does_ubuntu_1604_lts_use_lot_of_ram/d5v4q0f
According to the post, 16.04 preloads programs in ram, and Evolution is responsible for it. I'm not sure if this is true or not though. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1572801 Title: Ubuntu 16.04 Unity desktop uses much more ram than Ubuntu 15.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1572801/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs