Are you saying you have three notebooks with 300 sections? I agree that shouldn't be causing a memory leak but you realize that each section is saved as a ONE file, right? I don't know if you need to access them all at once or not, but it might make sense in terms of memory usage to archive some of the notes you are not using.3 of my Notebooks are around 300 Sites and more, but this shouldn't be a problem!
Are you saying you have three notebooks with 300 sections? I agree that shouldn't be causing a memory leak but you realize that each section is saved as a ONE file, right? I don't know if you need to access them all at once or not, but it might make sense in terms of memory usage to archive some of the notes you are not using.
As for your problem at hand, does memory spike when you text as well or only when inking? If it's only while inking, open OneNote and don't immediately try to write something. Open a new section or page and type something, then go back to the page you want to work in. See if this works as temporary workaround for the memory leak.
What size are the files?
If you have just rebooted and then open OneNote how much memory is used?
Does it go up after accessing each section? How much?
Does it ever go down?
How long does it take to exhaust memory (estimate)?
How much time would you say you spent in OneNote before the condition arises?
How many notebooks/sections would you normally access in a day or from boot time to problem occurrence?
What AntiVirus are you using?
Describe how you typically use OneNote and if you're copying into or out of OneNote to other programs.