Website is served from a 200KB binary
No libc. No VM. No runtime. The numbers below are read out of the process that is answering you right now ? not written into a template by hand.
Reload it. The pid changes: there are several worker processes, and the kernel hands the connection to whichever one is free.
"High-water" is the honest word: the collector is non-moving, so it recycles memory below that frontier through a free list rather than handing it back. The number stops climbing ? it does not fall. This server has served 20,000 requests with a flat footprint; before the collector was rewritten it died at 828.
An AOT systems language that lowers straight to x86-64. World failures are data you match on; broken invariants kill the program on the spot. There is no hidden recovery path, because there is no recovery path.