16GB is fine for most WSL2 development work.

Yes, for typical dev workloads — running a few containers, compiling code, editing in VS Code — 16GB on Windows 10 handles WSL2 without real slowdowns.

The secret: WSL2 uses a lightweight VM with a dynamic memory allocation. By default it can use up to 50% of host RAM (8GB). That’s plenty for a Node/React app, a Python server, a Postgres container, and a terminal or two. Windows itself runs fine on the remaining 8GB.

Where it gets tight: if your “large” WSL2 environment means running multiple heavy containers (Elasticsearch, Redis, a full Kubernetes cluster), or if you’re compiling huge C++/Rust projects with parallel jobs. Those eat RAM fast. Linux also aggressively caches disk data in memory, which WSL2 lets it do. That 8GB can fill up.

In practice, I’ve run Docker, two code editors, and a browser with 40 tabs on 16GB — WSL2 felt snappy. Crashes only happened when I opened 3 containers with 4GB each. So: start with 16GB. If you obsessively check Task Manager and see 95% usage, that’s your sign.

Future You might want 32GB if you never want to think about it. But 16GB gets the job done now.