Is there a direct connection between apache sending a big file 75 MB in size and swap overloading ?

I have a file which is about 75 MB in size,once someone start downlaoding it (for some reason once anyone is downlaoding a big file i see 10-20 connections from the same IP is it normal ? ) i see 0 MB free RAM and SWAP usage rising to 300 MB+

Is it something normal ?