Node-RED docker container. memory spike

General
1

Hello,
I'm running Node-RED inside a Docker container and everything had been working fine for a long time. I haven’t made any recent changes to the flows or configuration. However, starting today, Node-RED is being killed due to memory limit being exceeded.
The log ends with something like:
Killed /usr/local/bin/node $NODE_OPTIONS node_modules/node-red/red.js --userDir /data $FLOWS
I have not installed any new nodes or updated anything. The system had been stable for weeks.
Now it crashes shortly after startup, especially when flows start running.

My setup:

  • Node-RED version: 3.1.0
  • Memory available to container: 750Mi

What I've tried:

  • Restarting the container.
  • Watching memory usage (it rises quickly).
  • No new flows were deployed.

Questions:

  • What could be causing this sudden memory spike?
  • How can I identify memory-heavy nodes or leaks?
  • Would increasing --max-old-space-size help, or is this just masking the real issue?

Any insights or suggestions would be greatly appreciated :folded_hands:
Thanks in advance!