AWS EC2 Network IO tweak, Two things to check

1. Driver support for Enhanced networking Enhanced networking uses single root I/O virtualization (SR-IOV) to provide high-performance networking capabilities on supported instance types. SR-IOV is a method of device virtualization that provides higher I/O performance and lower CPU utilization when compared to traditional virtualized network interfaces. Enhanced networking provides higher bandwidth, higher packet per second (PPS) performance, and consistently lower inter-instance latencies. Earlier versions of ixgbevf driver, including the minimum recommended version, 2. »