Django memory leak: possible causes?
I haven't found the exact stuff I'm looking for (each project is a world!), but following some clues and advices I managed to solve the issue. I share with you a few links that could help if you are facing a similar problem.
django memory leaks, part I, django memory leaks, part II and Finding and fixing memory leaks in Python
Some useful SO answers/questions:Which Python memory profiler is recommended?, Is there any working memory profiler for Python3, Python memory leaks and Python: Memory leak debugging
Update
pyuwsgimemhog is a new tool that helps to find out where the leak is.
Django doesn't have known memory leak issues.
I had a similar memory issue. I found that there is a slow SQL causing a high DB CPU percentage. The memory issue is fixed after I fixed the slow SQL.