Redis can't set maximum open files to 10064 because of OS error: Operation not permitted.
Increased maximum number of open files to 10032 (it was originally set to 1024).
[cenos7]
ulimit -n 32768
change maximum number of open files 1024 to 32768
[참조]
http://myblog.opendocs.co.kr/archives/tag/redis-cant-set-maximum-open-files-to-10064-because-of-os-error-operation-not-permitted
