When does Cache become a problem and suggestions for managing

I’m new to mobile app development, and was just wondering how do I know I have a problem with the Cache? I looked at some of the apps on my phone and noticed it varies significantly. From as low as 500K to as much as 528MB for google maps.

The app I’m working on utilizes mapview and when I run the app on my phone it seems to fill up the cache fairly quickly. Usually by about 10 MB. My concern is if someone ran it for more than a minute or so, would it keep filling up.

Also any suggestions or links that will help me understand how to manage and keep in check.

Thanks