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
    3·
    2 years ago

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

  • tmpod@lemmy.ptEnglish
    1·
    2 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

  • flamekhan@lemmy.world
    0·
    2 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!

  • vintprox@lemmy.worldEnglish
    0·
    2 years ago

    Everything was loading so slow 2 hours ago. Hope it will get better from there.

    Edit: When I press “Post”, it doesn’t respond very long time, but reloading page helps.

  • OngoGablogian@sh.itjust.works
    0·
    2 years ago

    I am having some issues logging in to my lemmy.world account atm, just a heads up. I’m sure you folks are slammed right now, thanks for all the work you’re doing!