Multi-tenancy: how do you keep it fair? If some dude in another team runs a crazy expensive query, does that just wreck everyone else’s perf? We’ve seen this happen in other distributed systems where ‘fair scheduling’ is more of a wish than reality.
They had outage on 15 business days this month. January and February weren’t much better. We don’t want to migrate due to a lot of history on Github, but it is starting to have a significant impact on productivity.