The web application consists the feature to upload files on server. I have used the php inbuilt file upload functionality (move_uploaded()). The application is hosted on win server 2003 (SP2) with IIS 6.0 and PHP 5.2.4. When the application is accessed by multiple users at a time, the server performance spikes up, files are not uploaded to server. The upload_max_filesize, post_max_size settings are modified in php.ini. What can be the reason behind this? What server settigns we should check?
If multiple users are uploading images (regardless of where they are stored) there would be a spike in server usage. This seems normal?