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
    10•3 years ago

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

      • gfdoto
        0•3 years ago

        Seeing this post immediately made my ditch my neglected Lemmy instance to sign up for an account on this server. Thanks for the hard work.

    • deweydecibel
      1•3 years ago

      How so?

      Admin communicating information about the site to users like genuine human beings, instead of the corporate-sanitized pablum reddit admins speak in? Yeah that’s refreshing.

  • marsokod
    2•3 years ago

    Thanks a lot for your hard work, take your time with your children

  • LemmyLegume
    1•3 years ago

    Huge thanks to the lemmy.world team over the last couple of days to scale and maintain the instance! There’s a link for donating on the sidebar for lemmy.world - just a couple bucks a month can help us support this instance!

  • xikufrancescEspañol
    1•3 years ago

    How beautiful and cute the new lemmy world looks. thanks boss.

    Que bonito y lindo se ve el nuevo lemmy world. gracias jefe.

  • tmpodEnglish
    1•3 years 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

    • RuudOPMEnglish
      1•3 years ago

      Yeah with nginx doing load balancing

  • @Magister@lemmy.worldEnglish
    1•3 years ago

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

    Edit: worked after a few minutes

  • @Secret300@lemmy.world
    1•3 years 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

  • @F3F3N@lemmy.world
    1•3 years 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.

    • @Saundsr@lemmy.worldEnglish
      0•3 years ago

      Thanks

      • Clearing cache didn’t work for me.
      • Different web browser didn’t work for me
      • Resetting did work for Lemmy on desktop

      but can’t log into any app at this point.

      We’ll see what happens in a bit.

      Edit: slowly opening up I think.

      Edit 2: I can now get into all of the big 3 (Connect, Wefwef, Jerboa).

        • @Saundsr@lemmy.worldEnglish
          0•3 years ago

          Password reset was not in french. (I’m in US and reset email and the actual page was in English).

          I’m using the Big Three. (Connect = Working, Wefwef = Working, Jerboa = not working)