Well I didn't exactly pause it, and it was on PS3 for my partner not PS4, but it lost connection and completely stopped- I restarted the client and the file it started to download was smaller in total than before and it said "resumed downloading update" or something to that effect... Bare in mind this was PS3 not 4, but I'm thinking it will be the same. Not sure I would risk it, but hey, you have all night to download it, might be a better use of your time.