I'm running a Node.js application in a Docker container on WSL2, and I've noticed it freezes whenever memory consumption hits 4GB out of a total of 10GB, even though the CPU usage is only around 70%. It's puzzling because I would expect the app to utilize more memory before freezing. Should I consider allocating more resources, and what steps can I take to diagnose and resolve this issue?
5 Answers
If your CPU usage is consistently over 70%, that’s a lot of processing. At high CPU usage, you can expect performance issues like freezing. Monitor your usage to better understand which operations are consuming so much power.
First off, you might want to investigate why your application needs 4GB to run in the first place. There could be memory leaks occurring. Check your memory usage patterns and ensure you're cleaning up resources properly.
Since you're on WSL2, keep in mind that it can use up to 50% of your host’s RAM by default. If your app hits that limit, it could lead to freezing. You should configure WSL2 with more reasonable resource limits based on your hardware capabilities.
It’s peculiar that your app seems limited to a max of 4GB. If you’re using Azure App Service, ensure that there aren’t any restrictions possibly throttling your resources.
Garbage collection can definitely play a role here. Node.js typically runs into issues when reaching 2-3 GB due to the way it handles memory. Ensure you're efficiently managing object lifecycles. Offloading some tasks to a sidecar service could alleviate memory pressure.
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