VM providers don’t like people using swap, because it does terrible things to the system performance and confuses the memory management system (you’ve got two kernels both trying to manage RAM, and things get confused). So, as a VM provider, Digital Ocean want to avoid people using swap, so they require people to use a 2GB droplet. We, on the other hand, not being a VM provider, are more than happy to encourage people to use swap, because it does the job that is needed.
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