Optimize TCP_NODELAY
Reference
https://linux.die.net/man/7/tcp
https://www.jianshu.com/p/ccafdeda0b95
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_for_real_time/7/html/tuning_guide/tcp_nodelay_and_small_buffer_writes
https://linux.die.net/man/7/tcp
https://www.jianshu.com/p/ccafdeda0b95
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_for_real_time/7/html/tuning_guide/tcp_nodelay_and_small_buffer_writes