The high CPU issue that is causing midwest.social to slow way down and timeout on HTTP requests is still a mystery to me. But, it seems to do it less often and for less time now.
Here is CPU usage over 24 hours:
It's a bunch of SELECT statements in Postgres that all seem to fire at one time and take a while to complete as a batch. I've inspected the logs and haven't seen anything unusual. Just stuff federating and posts receiving upvotes.
Unfortunately it still happens, just not nearly as often as it used to. Need to meet up with my database admin to get to the bottom of the issue.