Running concurrent PHP scripts

Question

I\'m having the following problem with my VPS server.

I have a long-running PHP script that sends big files to the browser. It does something like this:

Answer 1

The same happens go to me and i'm not using sessions. session.auto_start is set to 0 My example script only runs "sleep(5)", and adding "session_write_close()" at the beginning doesn't solve the problem.