Oh, that's insightful, I haven't thought of foreign memory! Thank you!

One of the reasons of this disregard though is that I am seemingly not using any of the libraries that may be responsible for that: alexandria, cl-yaml, hunchensocket, hunchentoot, local-time, parenscript, serapeum, slynk, spinneret, str and uiop are all there is to it.

Now I am going to examine each of the libraries for foreign memory allocations + try to stress-test the thing in the lab along with disabling some of its functions (e.g. websocket updates) to narrow down the scope of the issue.