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How many PostgreSQL services? (swg-empire.de)

submitted 8 months ago* (last edited 8 months ago) by [email protected] to c/[email protected]

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I want to migrate my Nextcloud instance from MariaDB over to PostgreSQL. I already have a PostgreSQL service running for Lemmy. And I'm pretty starved for RAM.

Would it be better to just have one PostgreSQL service running that serves both Nextcloud and Lemmy? Or should every service have its own PostgreSQL instance?

I'm pretty new to PostgreSQL. But in my mind I would tend towards one service to serve them all and let it figure out by itself how to split resources between everything. Especially when I think that in the long run I will probably migrate more services over to PostgreSQL (and upgrade the RAM).

But maybe I am overlooking something.

Edit: Thanks guys, I've settled for a single instance for now. And after a little tuning everything seems to be running better than ever, with room to spare.

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[–] [email protected] 4 points 8 months ago

Here's the docker stats of my Nextcloud containers (5 users, ~200GB data and a bunch of apps installed):

No DB wiz by a long shot, but my guess is that most of that 125MB is actual data. Other Postgres containers for smaller apps run 30-40MB. Plus the container separation makes it so much easier to stick to a good backup strategy. Wouldn't want to do it differently.