> When running a 32-bit build of MongoDB, the total storage size for the server, including data and indexes, is 2 gigabytes. For this reason, do not deploy MongoDB to production on 32-bit machines.

From https://docs.mongodb.com/manual/installation/#faq-32-bit-lim...

There was also the issue where errors were either logged or not, based on the result of Math.random(): http://stackoverflow.com/q/16833100/1233508