openSUSE admin

So whilst that worked great in my test setup, in production it is atrociously slow compared to the previous Unicorn setup. I am trying with workers 2 and threads 2 which seems to be the recommendation with 2 cores (I also tried with threads 4 which is the result of the recommended calculation when migrating from Unicorn but that seemingly just caused more load).

It seems enabling preload (https://build.opensuse.org/package/rdiff/openSUSE:infrastructure:redmine/redmine?linkrev=base&rev=85) made it better.

It's quite usable now indeed, but I think about doubling the CPU cores to allow for more workers:

https://gitlab.infra.opensuse.org/infra/salt/-/merge_requests/2459

Following https://puma.io/puma/file.deployment.html again and this time ignoring the "Migrating from Unicorn" section and instead following "MRI", I changed threads to the default of 5 (upon reading further, one thread executes Ruby code at a time, so the threads limit concurrent requests, making the Unicorn calculation of 2 indeed quite limiting) via https://build.opensuse.org/package/rdiff/openSUSE:infrastructure:redmine/redmine?linkrev=base&rev=89 - this makes it much more snappy. I will still pursue the increase of cores/workers as it's a reasonably minor increase of resources giving more room for request spikes (the load can be seen to jump up every so often).