Yep. I once was tracking a white whale of a memory leak. Along the way I was able to optimize memory usage of the leaked objects. So I got to the point where I

Yep. I once was tracking a white whale of a memory leak. Along the way I was able to optimize memory usage of the leaked objects. So I got to the point where I thought maybe the leak was caused by simultaneous read, update, and delete operations on a single key, but by then I'd improved memory usage such that weekly, rather than nightly restarts were needed. The futures markets at the time were 24/7 but with a maintenance period on the weekends, so my boss just told me to leave it and let the restarts garbage collect.