this post was submitted on 01 Jul 2023
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Lemmy.World Announcements

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Looks like it works.

Edit still see some performance issues. Needs more troubleshooting

Update: Registrations re-opened We encountered a bug where people could not log in, see https://github.com/LemmyNet/lemmy/issues/3422#issuecomment-1616112264 . As a workaround we opened registrations.

Thanks

First of all, I would like to thank the Lemmy.world team and the 2 admins of other servers @[email protected] and @[email protected] for their help! We did some thorough troubleshooting to get this working!

The upgrade

The upgrade itself isn't too hard. Create a backup, and then change the image names in the docker-compose.yml and restart.

But, like the first 2 tries, after a few minutes the site started getting slow until it stopped responding. Then the troubleshooting started.

The solutions

What I had noticed previously, is that the lemmy container could reach around 1500% CPU usage, above that the site got slow. Which is weird, because the server has 64 threads, so 6400% should be the max. So we tried what @[email protected] had suggested before: we created extra lemmy containers to spread the load. (And extra lemmy-ui containers). And used nginx to load balance between them.

Et voilΓ . That seems to work.

Also, as suggested by him, we start the lemmy containers with the scheduler disabled, and have 1 extra lemmy running with the scheduler enabled, unused for other stuff.

There will be room for improvement, and probably new bugs, but we're very happy lemmy.world is now at 0.18.1-rc. This fixes a lot of bugs.

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[–] [email protected] 5 points 2 years ago (2 children)

Nice, really liking the update! Some questions about development for the fediverse: Is the code for running Lemmy written by one or person or a smome core team?

Is there any decision making process as to which features will be worked on in the next release or which bugs to prioritize?

In theory what would happen if the original developers started making changes that other people don't agree with? Would we get a fork then where servers have to choose to adopt it or not?

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[–] [email protected] 5 points 2 years ago

Thanks for the update. I especially like the transparency on not only the β€œupgrade” itself but also the potential issues encountered, together with the solutions. Seems rare nowadays, or I’m just seeing less and less people doing this.

[–] [email protected] 5 points 2 years ago

Really like seeing posts like this that explain what's going on. Thanks for all the hard work!

[–] [email protected] 5 points 2 years ago (1 children)

My first comment on here! Thanks for creating this, this looks fantastic and a great Reddit alternative. Keep up the great work.

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[–] [email protected] 5 points 2 years ago

Thank you! I love it here. Sending good vibes

[–] [email protected] 5 points 2 years ago

Fuck yeah upgrade hype

[–] [email protected] 4 points 2 years ago

Great stuff!

[–] [email protected] 4 points 2 years ago

I can finally login!

[–] [email protected] 4 points 2 years ago (1 children)

Awesome! Loading issues are still the bane of Lemmy's existence though, or at least it is for me and my experience with Lemmy. Everything just loads so slow. Sorting is still broken as well. Communities that I KNOW that are active just show as blank for me no matter what I sort by.

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[–] [email protected] 4 points 2 years ago

It keeps logging me out, plus when I log in, alarmingly other users' profile names flash in the top right corner for a second.

[–] [email protected] 4 points 2 years ago

I like it.
The site feels a lot better to me, and seems significantly gentler in terms of browser resource consumption.

[–] [email protected] 4 points 2 years ago

Not sure what fixed it (I'm sure though on my side I did nothing since the last failed login) but the login form finally works again!

[–] [email protected] 4 points 2 years ago

This looks like it’s exposed some weaknesses, and it sounds like the team has it under control.

I’m moving right now and can’t dedicate time to development, but once I’m up and running I should be able to start contributing.

Scalability is always a concern with these sites, so there’s plenty to do to improve that

[–] [email protected] 4 points 2 years ago

Is there a way to follow the update status while this instance is down?

I knew the update was coming, so I expected the downtime, but I could not find any info about when it was expected to be up and running again?

Thanks for the great and ongoing work put into managing this endeavor!

[–] [email protected] 4 points 2 years ago* (last edited 2 years ago)

Have you considered running your Lemmy instance on more than a single machine? If it is possible to run two lemmy containers anyway (ie, lemmy is not a singleton), why not run them on separate machines? With load balancing you could achieve a more stable experience. It might be cheaper to have many mediocre machines rather than a single powerful one too, as well as more sustainable long-term (vertical vs horizontal scaling).

The downside would be that the set-up would be less obvious than with Docker compose and you would probably need to get into k8s/k3s/nomad territory in order to orchestrate a proper fleet.

[–] [email protected] 4 points 2 years ago

thank you for letting us know behind-the-scene stuffs.

me myself is a sysadmin and really like story of successfully scaling up servers. very satisfy to hear.

once again, thank you!

[–] [email protected] 4 points 2 years ago* (last edited 2 years ago) (1 children)

I can't login from my main browser even if I clear the cache and cookies, if I use other browser it works

Edit: I fixed it just by changing my browser language to English and restarting it, hope this is useful for someone.

Also, thanks to Ruud and team for the hard work, everything seems to work really well and fast.

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[–] [email protected] 4 points 2 years ago

I really enjoy how lemmy is growing!

[–] [email protected] 4 points 2 years ago

We're alive!!!

Thank you :)

[–] [email protected] 4 points 2 years ago (1 children)

Is there a issue with the api? ( Because the api wrapper lemmy-js-client doesnt work on login. ) I tried it yesterday but not today yet. I will test it when i can :)

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[–] [email protected] 4 points 2 years ago

We're back baby!

[–] [email protected] 4 points 2 years ago

Special thanks to the other guys for helping make this update possible. Site is snappier than ever and the UI looks fantastic.

[–] [email protected] 4 points 2 years ago

0.18 looks a lot better. Far better use of screen real estate on PCs.

Lag is still very prevalent though. Page loading, upvote delay. It's frustrating.

Live comments (like on new Reddit) does not seem to be working on 0.18, so I have to manually refresh the page each time. That also resets the comment sort to Hot, causing further annoyance.

[–] [email protected] 4 points 2 years ago

Working well here and can use Jerboa again. Although wefwef is really growing on me!

Edit: couldn't post from Jerboa, got network error. But wefwef worked.

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