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 voilà. 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.

  • Tontoz@lemmy.world
    4·
    1 year ago

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

  • Secret300@lemmy.world
    1·
    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

  • Magister@lemmy.worldEnglish
    1·
    1 year ago

    I cannot connect with Jerboa, it always says user or password incorrect 🙁

    Edit: worked after a few minutes

  • Tmpod@lemmy.ptEnglish
    1·
    1 year ago

    Awesome work!

    I’d like to know more about the exact container topology you have, since I may try something similar on my instance as well.
    Is it something like this?

    ┌───┐       ┌───┐
│WEB│       │WEB│
└─┬─┘       └─┬─┘
┌─┴─┐ ┌───┐ ┌─┴─┐
│BE ├─┤IMG├─┤BE │
└─┬─┘ ├───┤ └─┬─┘
  └───┤DB ├───┘  
      └───┘

    Thank you! :3

  • Merulox@lemmy.world
    0·
    1 year ago

    Profile pictures on user profiles are still stretched, and now the upvote arrows doesn’t turn blue until you refresh the page when you press it

    Other than that, this is a fantastic design update

    • phrankygee@lemmy.world
      0·
      1 year ago

      When I sort my comments by “Top Week” I get stuff from 10 days ago.

      Edit: Actually, no matter what time period I select, I still see old posts from 10 days ago.

  • F3F3N@lemmy.world
    0·
    1 year ago

    A bit off topic, but does anyone else hate how when you click on a post and then go back, the page auto-resets to the top? Wish it would remember how far down you scrolled and return to that point.