Being ddossed is not going to affect you. For Heap to kick in, the page needs to be rendered and their javascript snippet processed. A DDos attack is just going

Being ddossed is not going to affect you. For Heap to kick in, the page needs to be rendered and their javascript snippet processed. A DDos attack is just going to send lots of traffic (eg: a gazillion wget requests made to your domain. Your apache or nginx logs are the ones that are going to explode.)