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 @stanford@discuss.as200950.com and @sunaurus@lemm.ee 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 @sunaurus@lemm.ee 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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[–] MyKidsAreCool@lemmy.world 7 points 1 year ago

I really appreciate the transparency in this post. There's enough information for me to feel like I kind of know what's going on, and I can go dig into it deeper if I feel like it. This is a breath of fresh air from what I'm used to, thanks so much!

[–] BendyLemmy@lemmy.world 7 points 1 year ago

Wow - we have a new defniition of 'awesome dudes'.

Thank you.

[–] ckskate@lemmy.world 7 points 1 year ago

Awesome to see the transparency and some tech details of what these updates entail! I’m loving the bug fixes 0.18 brought too

[–] wilberfan@lemmy.world 7 points 1 year ago

YOU'RE DOING GOD'S WORK, SON! Keep up the good work! πŸ†

I'm sure there will be bugs for others but it's smooth and bug free for me. Thanks so much for the devs and contributors.

[–] AndreTelevise@lemmy.world 7 points 1 year ago* (last edited 1 year ago)

It's faster now, and we finally have buttons for rich text features! Congratulations!

Update: upvotes are a bit broken and weird right now, I need to refresh every time to see that I upvoted. But that's really the only issue I see right now.

[–] WigglingWalrus@lemmy.world 7 points 1 year ago

πŸŽ‰ Great work!

[–] guyman@lemmy.world 7 points 1 year ago (2 children)

Lot of network errors, but it could be jerboa.

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[–] ArgonautVehicle@lemmy.world 7 points 1 year ago* (last edited 1 year ago)

Favicon seems to be missing now. Just a heads up!

[–] liaizon@social.wake.st 7 points 1 year ago

@ruud oh wow 0.18.1 fixed the broken federation/webfinger issue!!! this is great news

[–] Yaxoi@lemmy.world 6 points 1 year ago (1 children)

I'm curious; is this instance pysically running on a local private server somewhere or in the cloud in some data center?

[–] ruud@lemmy.world 7 points 1 year ago (2 children)

On a physical server in a datacenter

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[–] erik1984@lemmy.world 6 points 1 year ago

Thanks for the hard work on the upgrade! Much appreciated although I'm only using the web version (not needing specific client apps). Lemmy World feels quite 'snappy' when browsing now.

Lemmy seems pretty slow. I wonder how many more people have joined here now.

[–] monstad@lemmy.world 6 points 1 year ago

was struggling for a while, but it seem to be nice and fast now.. thank you!

[–] newthrowaway20@lemmy.world 6 points 1 year ago

Having login issues on the browser. Not logging in at all. But on liftoff where I was already logged in, everything seems to be working.

[–] AlmightySnoo@lemmy.world 6 points 1 year ago (5 children)

To everyone having a login problem, it seems that resetting the password solves the issue! Maybe this means that the upgrade corrupted the stored hashes somehow?

[–] dragontamer@lemmy.world 5 points 1 year ago (2 children)

Login page is 404 erroring to me, at least the XmlHTTPRequest is that's associated with the button.

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Thank you for the hard work! Enjoying Lemmy.world quite a bit. :)

[–] Secret300@lemmy.world 6 points 1 year ago

we created extra lemmy containers to spread the load. (And extra lemmy-ui containers). And used nginx to load balance between them.

Had no idea nginx did that. There's so much I need to learn

[–] LolaCat@lemmy.world 6 points 1 year ago

Just signed up and everythings working well for me!

[–] varnia@lemmy.world 6 points 1 year ago

Updated Jerboa. Thanks for your efforts, transparency and insights.

[–] ghariksforge@lemmy.world 5 points 1 year ago

Many thanks for the transparency! This is great.

[–] Grangle1@lemmy.world 5 points 1 year ago

Login problem is fixed for me, yay! Back on Jerboa and here on the browser! Thanks for your hard work and for putting up with me, lol.

I'm getting network errors that aren't allowing me to actually view content on Jerboa right now, though, but at this point I'm assuming it's a Jerboa thing and not a problem with the instance.

[–] darkbaron202@lemmy.world 5 points 1 year 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!

[–] nulldev@lemmy.vepta.org 5 points 1 year ago

New user registrations closed until tomorrow

Warning: Be careful, this might trigger this bug here: https://github.com/LemmyNet/lemmy/issues/3422#issuecomment-1616112264

[–] yuki2501@lemmy.world 5 points 1 year ago

Thanks! Now I can use Connectβ„’ for Lemmy without problems. πŸ‘πŸ™‚

[–] mintiefresh@lemmy.world 5 points 1 year ago

We're alive!!!

Thank you :)

[–] sigh@lemmy.world 5 points 1 year ago

Fuck yeah upgrade hype

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