When introducing parallelism in Rails,
the real danger isn’t threads.

It’s connection pool exhaustion.

Based on a Kaigi on Rails 2025 talk by @katakyo, I wrote a breakdown of how to safely scale parallel workloads in production Rails systems.

Full article here:

https://rubystacknews.com/2026/02/12/designing-safe-parallelism-in-rails/

#Ruby #Rails #Sidekiq #Performance #AWS #Scaling

When introducing parallelism in Rails,
the real danger isn’t threads.

It’s connection pool exhaustion.

Based on a Kaigi on Rails 2025 talk by @katakyo, I wrote a breakdown of how to safely scale parallel workloads in production Rails systems.

Full article here:

https://rubystacknews.com/2026/02/12/designing-safe-parallelism-in-rails/

#Ruby #Rails #Sidekiq #Performance #AWS #Scaling

Can a #Mastodon specialist enlighten me?

Yesterday my host, @mastohost sent me an email to tell me that my media storage was full (which surprised me, especially because I very recently started automatically deleting my oldest posts to avoid just this). Today, rummaging through the admin, I found this very surprising graph in #Sidekiq
What could this be? Or is it the deletion of old posts that triggered that spike in processes? But if old posts have been deleted, why is the media storage full?

Can a #Mastodon specialist enlighten me?

Yesterday my host, @mastohost sent me an email to tell me that my media storage was full (which surprised me, especially because I very recently started automatically deleting my oldest posts to avoid just this). Today, rummaging through the admin, I found this very surprising graph in #Sidekiq
What could this be? Or is it the deletion of old posts that triggered that spike in processes? But if old posts have been deleted, why is the media storage full?

Some #BSDCafe #Mastodon #Sidekiq stats