Redis vs MongoDB, which one uses more memory?

[Hao Lee]

Hi,
My VPS only has 512MB memory. So, I want to know which one uses more memory.
Thanks.

[yariplus]

Redis.

It literally stores everything in memory.

[Hao Lee]

@yariplus Thanks for your reply.
But I read some articles. It says that MongoDB need to be hosted on a separated host. So, It seems that MongoDB need more memory. I have no idea of which one is right.

[frissdiegurke]

Since you're using a VPS, you have enough permissions to install mongodb on that very server. I don't see why it would require you to host on a different host.

[Hao Lee]

@yariplus @frissdiegurke
Thanks for your help !
I have read this post. Both of you are right.
https://community.nodebb.org/topic/534/redis-vs-mongodb/11