Operating the runtime.
WHAT TO USE
A process manager, restarting on failure and on server restart.
WHY
A crashed process otherwise stays down.
WHAT TO CONFIGURE
Automatic restart Log output to files or a collector Memory limits Startup on boot
WHAT ABOUT MULTIPLE CORES
One process uses one core.
WHAT TO DO
Run several processes behind a load balancer or the clustering facility.
WHAT TO PUT IN FRONT
A reverse proxy, handling encryption, static files and request limits.
WHY
It is better at those than the application.
WHAT TO SET
Graceful shutdown: finish in-flight requests, close connections, then exit.
WHY
Abrupt termination during deployment drops requests.
WHAT TO MONITOR
Event loop delay, which indicates blocking Memory, which indicates leaks Restart frequency
WHAT A GROWING MEMORY PROFILE INDICATES
A leak: listeners, timers or caches accumulating.
WHAT TO CHECK IN SHARED HOSTING
Whether persistent processes are permitted at all.
