Earlier quoted context omitted.
In a high performance service with good maintenance and upkeep, you page for all 500s. A noisy pager forces the team to fix the 500s. Maybe the Github Actions infrastructure isn't run like that. edit: my oncall rotation notified on all 500s, 24/7, not just rates - https://news.ycombinator.com/item?id=48279262
Im curious about this: because in my experience (working on smaller services though), a small number of errors is always there, as a "baseline". Recently there was this: https://news.ycombinator.com/item?id=47252971 "10% of Firefox crashes are caused by bitflips" Which makes me think a small amount of random issues which happen even though nothing is broken, is normal everywhere. Especially once move things around on…
It does require constant tuning and adjustment though.