What is the cost?
What exactly is the cost of self hosting a Lemmy instance? Understandably you would want a powerful server, but that would be just a single one time purchase.
Where does the rest of the cost come in? Does it require more than a 2 gigabit connection and thus require a data centers 10 gigabit connection?
If I could run an instance on 2 gigabits and spending a 1-3 thousand on a server then I'd be interested in giving it a try.
Depending upon how many users you are looking to host, Lemmy instances are not very taxing. Most instances are on quite modest hardware.
I host an instance for myself. I have subscribed to many communities (10-20), and I run it on a 1 CPU + 1 GB RAM DigitalOcean droplet. However, the Lemmy instance was OOM-killed already once, and I expect that I have to upgrade eventually.
The droplet costs $6/month.
That's strange, from what I've read a VPS like that should be able to handle at least 20 concurrent users.
Are you running anything else on the VPS?
Nope nothing else. Sadly.
Really weird. Might be a bug.
I can't find anyone else reporting memory usage problems. Maybe you could ask in the support community and see if anyone else has encountered the same problem.
Your VPS should be more than enough and you shouldn't have to spend more money because of a software issue.
would swap help?
"If you need to use the swap, you're doing it wrong" -- That's what I learned long ago. And it has held up so far.
Interesting. I've never heard that. I use swap all the time and it's saved me from OOM scenarios. I'm currently limited on RAM so maybe it makes more sense for my situation.
zramand other compressed swap approaches can help too (with less of a performance hit) although I use real swap as a fallback. Some would recommend usingzswapin that case, but I still want compression in ram to be heavily prioritised but YMMV.I have a laptop with an NVMe drive, and even using a swap on NVMe is orders of magnitude slower than RAM. Usually as soon as you have to swap, everything grinds to a halt quickly, and more stuff stacks up. You can decide for yourself, if you'd rather die a slow death or a quick death.
Yeah I definitely get that. By default, swap is supposed to be secondary to ram, usually swappiness is configured that way. I was not implying that swap was a replacement for RAM, just that it might save you from OOM situations in exchange for some performance dips.
Right? Like, my "first" machine had 512MB of ram in an era where most people were running 4GB. SWAP made more modern distributions possible for me. I mean, then again, that wasn't so much a choice than the harsh reality of growing up broke!
(My ACTUAL first machine was more like 64MB, but I never did much with it)
Right? Like, my "first" machine had 512MB of ram in an era where most people were running 4GB. SWAP made more modern distributions possible for me. I mean, then again, that wasn't so much a choice than the harsh reality of growing up broke!
(My ACTUAL first machine was more like 64MB, but I never did much with it)
Depends how many people you are hosting for. But what you describe seems overkill, I think Lemmy.ml just upgraded to a 6 core cpu and 32gb of ram and they have 30k+ members.
That's a pretty good benchmark. Thank you!
Not much at all.
For a basic instance running <1k registered users, it seems the lemmy.ml instance survived a while with a quad core and some middling ram on a VPS. Really, connection bandwidth and/or CPU is not the bottleneck with Lemmy since most heavy image/video content continues to be linked externally, it's the database management to keep all comments and posts sorted correctly that takes resources. So you need storage IO and memory more than anything.
Sure if you want to grow as large as lemmy.ml you will probably be needing a "dedicated server" with high expenses. However, I'd bet any old generic office PC, or even a Pi, can run most small instances easily if you have access to a 2-gig symmetrical connection.
I'm hosting a personal instance in my home rack on a VM of 1 CPU / 2GB RAM. My only concern is to see how fast the disk usage grows over time (years?) no idea yet if lemmy cleans up old content or not. I'd imagine not since that defeats the purpose.