Question 1

How do I install MongoDB on a VPS?

Accepted Answer

Add MongoDB's official repository, then "sudo apt install mongodb-org". Enable and start with systemd. Create an admin user, enable authentication in mongod.conf, and configure bindIp for security. MongoDB listens on port 27017 by default.

Question 2

Is self-hosting MongoDB cheaper than Atlas?

Accepted Answer

Yes, significantly. MongoDB Atlas free tier is limited, and paid tiers start at $57/month. Running MongoDB on a $10-20 VPS gives you more resources and full control. You handle backups and updates yourself.

Question 3

How much RAM does MongoDB need?

Accepted Answer

MongoDB uses WiredTiger which aggressively caches data. Minimum 1GB RAM for small datasets, 2-4GB for medium workloads. MongoDB will use about 50% of available RAM for cache by default. Monitor with db.serverStatus().

Question 4

How do I secure MongoDB on a VPS?

Accepted Answer

Enable authentication in mongod.conf, create admin and application users with minimal permissions, bind to localhost only (use SSH tunnels for remote access), enable TLS for connections, and keep MongoDB updated. Never expose 27017 to the internet without auth.

Install MongoDB

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MongoDB Template

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