Comment by Lwerewolf

FoundationDB's approach - look up their testing framework.

I've worked in a company that, for all intents and purposes, had the same thing - single thread & multi process everything (i.e. process per core), asserts in prod (like why tf would you not), absurdly detailed in-memory ring buffer binary logs & good tooling to access them plus normal logs (journalctl), telemetry, graphing, etc.

So basically - it's about making your software debuggable and resilient in the first place. These two kind of go hand-in-hand, and absolutely don't have to cost you performance. They might even add performance, actually :P