It was about the OOM killer as the sibling comment says, yeah. I'm surprised you're so incredulous. OOM Killer and GC stalls are some things I've run up against in my career frequently. I'm sorry my comment didn't live up to your expectations, it was hastily typed on mobile.
His point was that the comment was unclear if you'd also read it hastily :-)
I imagine his logic was something like: "How can OOMs happen less often if you run more processes (possibly on the same machine)?", while your comment actually wants to say: "if a specific service is affected by an OOM, with microservices only that specific microservice goes down, since it's probably running on its own hardware".
