MySQL has gone away for the query when using Twenty Forteen

I had a lot of MySQL has gone away for the query errors when using some plugins and other stuff. I removed all of those server consumption plugins. But still at few times in a day when I get high traffic, the same error occurs.
This time the error is originating from the Wordpres tentyfourteen theme. Mostly from index.php requiring header.php file, featured content files and some others. Why is twentyfourteen theme need many SQL queries and please point out the high server consumption taking “features” of twentyfourteen and please tell me how to disable those “features”. Or Is there a lightweight version of Twenty Fourteen ?