>> but optimizing non-peak memory has no impact. You have to be able to identify the peak in order to reduce memory usage.

In some sense this is only true if you're the end user of a platform, if you're trying to pack jobs onto machines then you actually do care about the utilization at any given time, since you can oversubscribe based on someone's max usage.

E.g., you can give everyone a limit based on their peak memory, but then bin pack based on their actual usage (and evict when you're wrong)