I had a memory leak in a Python program (that's a really rare thing), that would trigger OOM kills in about 3-4 days. After a few days of investigation that yie

I had a memory leak in a Python program (that's a really rare thing), that would trigger OOM kills in about 3-4 days. After a few days of investigation that yielded nothing, I put a restart job every day or so, and returned to it only after a few months when I had some time. Eventually it came down to someone replacing dict.get() with dict.setdefault() in a lookup dictionary in some utility library, causing each miss to leak a small, non GC-ed empty entry in an otherwise small lookup table.