not running lightspeed. i have gone through all sorts of things with bluehost, but as soon as they discovered that it stops and starts when i activate or deactivate wordfence and w3, they pretty much dismissed me.
that pic at the top is exactly what i'm experiencing. i'll have to read that more thoroughly when i get back from lunch. a brief scan does seem to indicated that caching plugins could cause this due to too much gzipping going on...