Even worse, the effects that you mention (garbage collection, etc.) are morally equivalent to an increase in utilization, which pushes you towards the latency singularity that the article is talking about.
As an oversimplified example, suppose that your system is 10% utilized and that $BAD_THING (gc, or whatever) happens that effectively slows down the system by a factor of 10 at least temporarily. Your latency does not go up by 10x---it grows unbounded because now your effective utilization is 100%.
As an oversimplified example, suppose that your system is 10% utilized and that $BAD_THING (gc, or whatever) happens that effectively slows down the system by a factor of 10 at least temporarily. Your latency does not go up by 10x---it grows unbounded because now your effective utilization is 100%.