Thanks for your replay I will update nginx I search again.

Can you anwser on my couple questions:
1. Can you tell me what happend with downloaded part of files when I have:
1.1 [error] 16082#0: *1264804 upstream prematurely closed connection while reading upstream
1.2 [crit] 16082#0: *1264770 pwritev() <path> has written only 49152 of 151552 while reading upstream
This part of file is still on disc and don't deleted after error?
2. Why when I set 40g for cache I have 90-100GB in cache?
3. Can you tell me when in offcial repo for redhat 7 will be nginx 1.13.+? Currently the newest is 1.12.2.

Br Andrzej Walas