On my production server, which is hosted on digital ocean, if that helps, Ubuntu 12.04, I have RoR 4 and rake 10.1.1.
When I deploy, I run rake assets:precompi
rake assets:precompi
This might help someone. For me, since i couldn't use 'fallocate' command, i had to do:
sudo dd if=/dev/zero of=/mnt/4GB.swap bs=4096 count=1048576 sudo chmod 600 /mnt/4GBB.swap sudo mkswap /mnt/4GB.swap sudo swapon /mnt/4GB.swap