The getting-started requirements now say a host needs 3 GB of RAM, 4 GB
recommended, and drop the advice to lower APP_MEMORY_LIMIT to 1g on a
2 GB host. The compose and .env example comments say the same.
At boot the app reads its cgroup memory limit (v2, then v1) and logs one
line when it is below MEMORY_FLOOR_MB. The support report adds the
container limit and a note below the floor, and Admin > System status
shows "below the supported floor" next to the existing low-heap flag.
The app keeps running either way.
The pressure report re-armed only after the heap fell under 70 % and
half an hour passed, so a heap that climbed to its limit soon after an
85 % report died with only that older report on record. A 95 % tier
now writes the same report at once, whatever the cooldown, and re-arms
under 85 %.
The image sets NODE_OPTIONS so Node writes its diagnostic report to
stderr when the heap runs out, with environment variables and network
interfaces excluded. The heap-diagnostics and scaling docs say how to
keep the flags when overriding NODE_OPTIONS.
Heap figures share one megabytes helper with the support report.
Marc-André Bombeck