Hey, Mastodon v3.1.3 raises the minimum required version of Redis from 3 to 4. I have now included a bold warning about this in the release notes -- I'm sorry I haven't done so from the start.
After upgrading to 3.1.3, much more enqueued workers. · Issue #13404 · tootsuite/mastodon
My instance used to have a load average under 0.3 0.3 0.3 and there's hardly any CPU usage by Ruby and Bundle when nobody accessed to my site. However, there are now many enqueued jobs in sidek...