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 voilร . 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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[โ€“] [email protected] 2 points 1 year ago
[โ€“] [email protected] 2 points 1 year ago (4 children)

I cannot see my subscriptions, not sure if its me or what. On Jerboa 0.34

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[โ€“] [email protected] 2 points 1 year ago

thank you for upgrading! I much prefer the new URL structure of this version

[โ€“] [email protected] 2 points 1 year ago

YEAH BABEYYY

[โ€“] [email protected] 2 points 1 year 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.

[โ€“] [email protected] 2 points 1 year ago

Are you hosting on AWS?

[โ€“] [email protected] 2 points 1 year ago

thank u for letting us know what happening behind the scene. Me myself is a sysadmin and really love to read story about scaling up servers and it actually works! Once again. Thank you.

[โ€“] [email protected] 2 points 1 year ago

Let us know where donations can go, suspect a stacked docker-compose will reach limits very quickly

[โ€“] [email protected] 2 points 1 year ago

Showing us the true value of horizontal instead of vertical scaling! Kubernetes when?

[โ€“] [email protected] 2 points 1 year ago

Seems that sometimes the hot algorithm gets messed up :/

[โ€“] [email protected] 1 points 1 year ago
[โ€“] [email protected] 1 points 1 year ago

Browser still not working for me. The interface loads but there's no content. Also can't login on browser, after entering user and password and clicking login nothing happens.

[โ€“] [email protected] 1 points 1 year ago

On a somewhat related note, how are you coping with the scaling from the Reddit migration?

[โ€“] [email protected] 1 points 1 year ago

@ruud Thank you for the work you guys are doing. Without you, we wouldn't have an organized place to go after Reddit and Twitter.

[โ€“] [email protected] 1 points 1 year ago

Works with Jerboa again (yay).

Kinda makes sense that multiple containers might scale better. The actual processes within the container may have some limitations in terms of how well they thread etc.

[โ€“] [email protected] 1 points 1 year ago

Well done! Know that your efforts are greatly appreciated. Thank you!

[โ€“] [email protected] 1 points 1 year ago

Awesome job! Already loving it here.

[โ€“] [email protected] 1 points 1 year ago

Browser still not working for me. The interface loads but there's no content. Also can't login on browser, after entering user and password and clicking login nothing happens.

[โ€“] [email protected] 1 points 1 year ago

Good to see this for the Lemmy website. This will do a lot.

[โ€“] [email protected] 1 points 1 year ago

Awesome, Jerboa revived!

[โ€“] [email protected] 1 points 1 year ago

Thanks for the monster effort on the update, these things are never trivial.

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