In win10 system, recently discovered that everything is all right under the Windows 7 project under win10 gave an issue,

All requests all the response, is above a certain size of file a pending (is probably more than 80 KB), apache log without any records, search for a day, setting EnableMMAP off
EnableSendfile off
But only in 2.0, version 2.2, version 2.4 both 32-bit and 64 - bit is not effective,

Please instruct to a friend!