KodiakBear:
so I have been inspecting apache logs in realtime over mac os x terminal.it is clear that when arduino hangs on GET, Apache simply waits for GET request. There is nothing seems to be wrong in the server side.
if I change my slider in the browser when hang happens, it does send the slider value to sql according to apache logs
Slider?
How often are you sending requests now? Are you still waiting the one millisecond between requests?