Has anyone come across this issue, when using the Google Webmaster Data Highlighter we have noticed our cscart site goes down. Our host has said that Google is requesting every page of the site at once and we are running out of memory - any ideas??
Yep. As long as you can get through the initial set up, you're good to go. Go slow so you do not crash your site.
I quit using it all together because rich snippets does just as well or bad in my case. I have two sites with tens of thousands of products and I don't think I have ever had more than 100 in either the of the lists.