I have a meteor project on a nitrous box ( 512 mb ).
i suddenly started to have problems when starting the application. the mongodb can't start.
I made a meteor reset
to reset the database but still have the same problems
Nothing changed on my project and i dont know why i have "not enough memory" .
I even updated my box to 640 mb but i still have the same problem.
This is a something very usual on Nitrous.io
Since MongoDB stores Prealloc Version of the DB, you should need to remove them (delete) from the project.
Also take a look on the auto pars, if you are not using Heroku remove it.
take a look on this route.
And remove the Preallocs (this is not a good practice, but seems to be only solution on a Free nitrous.io box)
Good luck