Umbraco 15 - how to reduce memory usage?

Im trying to reduce memory footprint of an Umbraco 15 installation. Umbraco uses 230mb when we spin up a docker container.

After accessing Umbraco backend and logging ind, Umbraco container uses 470 mb (we only logged in)

Memory usage seems to be minimum at 470mb.

The Umbraco installation is used for

  • deliverying content using content delivery api
  • delivering images uploaded to media section

There is not much content (10 pages) but there is a lot of doctypes etc.

For frontends

  • Content is fetched and cached elsewhere.
  • Images are not fetched from disk not using /media.

Umbraco backend is still accessing images direct.

What ive done:

Questions:

  • Is that expected mem usage or what can i do?
  • how does Umbraco react on memory restrictions?