I think you mean 10GB of RAM?
Which version of krita and which operating system are you using?
Has your type of activity with krita or anything about your computer changed recently?
Are you seeing this in Task Manager (or its equivalent)?
What does the krita status bar RAM meter say about it?
Have you been doing lots of work on large documents or multiple documents?
What happens if you Save your open work and then Quit/restart krita and open those documents you were working on?
This topic has some information about it: