So i have Nginx as a web server with PHP running as fastcgi what nginx serves traffic via upstreams.

The strange bug i have encountered is the fact when i upload a large file lets say 2GB and PHP must pass this file to a mapped hard drive via network sharing. PHP/Nginx does not serve traffic to anyone until that temp(uploaded file) has been successfully moved to the mapped hard drive.

Does anyone know why it would be locking up like this or how to solve it ? I don't think it is Nginx i think it is just PHP that is locking up. But it is a nightmare trying to figure out how to keep it serving traffic since there will be 60-120 seconds while PHP is pushing this file to the mapped hard drive that no traffic gets served and everyones pages keep loading (they don't time out just keep loading / waiting for first byte what is always sent as soon as the file upload is complete.)

If it helps its latest php builds default production config and itpp2012's Nginx Build.