Recently I faced a big problem with large file uploads. One of my client has a Centos5  dedicated server. I created a script for Video upload and conversion. I also added a progress bar to show file upload progress. This progress bar has limit of 100MB because of flash limitation. Everything was working fine for files less than 50MB, but as size grows the upload hangs on 20 – 30%.. I did every thing in php.ini and apache.conf but nothing helped. I wrote to server admin at least 50 times …