Hi. Most devices get hot when charging. How hot is it? Warm like an electric blanket? Or too hot to touch? If it's too hot and you're using the original Apple charger, you may have a hardware problem. How old is your device? The "periodic" events are normal and occur periodically. The jetsam events occur when an app needs memory. This is often when Safari loads a page with lots of ads and other decoration. Also, as I suggested to kayihan, you should post in Using iPhone, where more iPhone users will see it. Be sure to identify your device model.